69894145 has 4 divisors (see below), whose sum is σ = 83872980. Its totient is φ = 55915312.

The previous prime is 69894131. The next prime is 69894151. The reversal of 69894145 is 54149896.

69894145 = T₅₂₈₅ + T₅₂₈₆ + ... + T₅₂₈₉.

It is a happy number.

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 39025009 + 30869136 = 6247^2 + 5556^2 .

It is a cyclic number.

It is not a de Polignac number, because 69894145 - 2⁵ = 69894113 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 69894095 and 69894104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6989410 + ... + 6989419.

It is an arithmetic number, because the mean of its divisors is an integer number (20968245).

It is a Proth number, since it is equal to 2133 ⋅ 2¹⁵ + 1 and 2133 < 2¹⁵.

Almost surely, 2^69894145 is an apocalyptic number.

It is an amenable number.

69894145 is a deficient number, since it is larger than the sum of its proper divisors (13978835).

69894145 is a wasteful number, since it uses less digits than its factorization.

69894145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13978834.

The product of its digits is 311040, while the sum is 46.

The square root of 69894145 is about 8360.2718257243. The cubic root of 69894145 is about 411.9206829590.

The spelling of 69894145 in words is "sixty-nine million, eight hundred ninety-four thousand, one hundred forty-five".