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3812869 = 5696701
BaseRepresentation
bin1110100010111000000101
321011201021101
432202320011
51434002434
6213420101
744260144
oct16427005
97151241
103812869
112174735
12133a631
13a36648
1471375b
15504b14
hex3a2e05

3812869 has 4 divisors (see below), whose sum is σ = 3820140. Its totient is φ = 3805600.

The previous prime is 3812843. The next prime is 3812899. The reversal of 3812869 is 9682183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9682183 = 71383169.

It can be written as a sum of positive squares in 2 ways, for example, as 1050625 + 2762244 = 1025^2 + 1662^2 .

It is a cyclic number.

It is not a de Polignac number, because 3812869 - 27 = 3812741 is a prime.

It is a super-2 number, since 2×38128692 = 29075940022322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3812819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2782 + ... + 3919.

It is an arithmetic number, because the mean of its divisors is an integer number (955035).

Almost surely, 23812869 is an apocalyptic number.

It is an amenable number.

3812869 is a deficient number, since it is larger than the sum of its proper divisors (7271).

3812869 is an equidigital number, since it uses as much as digits as its factorization.

3812869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7270.

The product of its digits is 20736, while the sum is 37.

The square root of 3812869 is about 1952.6569079078. The cubic root of 3812869 is about 156.2250340911.

The spelling of 3812869 in words is "three million, eight hundred twelve thousand, eight hundred sixty-nine".

Divisors: 1 569 6701 3812869