52001669 has 4 divisors (see below), whose sum is σ = 53794860. Its totient is φ = 50208480.

The previous prime is 52001659. The next prime is 52001681. The reversal of 52001669 is 96610025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19909444 + 32092225 = 4462^2 + 5665^2 .

It is a cyclic number.

It is not a de Polignac number, because 52001669 - 2²⁰ = 50953093 is a prime.

It is a super-2 number, since 2×52001669² = 5408347157571122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1793161 = 52001669 / (5 + 2 + 0 + 0 + 1 + 6 + 6 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52001659) 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, 896552 + ... + 896609.

It is an arithmetic number, because the mean of its divisors is an integer number (13448715).

Almost surely, 2^52001669 is an apocalyptic number.

It is an amenable number.

52001669 is a deficient number, since it is larger than the sum of its proper divisors (1793191).

52001669 is a wasteful number, since it uses less digits than its factorization.

52001669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793190.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 52001669 is about 7211.2182743279. The cubic root of 52001669 is about 373.2551089474.

The spelling of 52001669 in words is "fifty-two million, one thousand, six hundred sixty-nine".