69897525 has 12 divisors (see below), whose sum is σ = 115564032. Its totient is φ = 37278640.

The previous prime is 69897517. The next prime is 69897533. The reversal of 69897525 is 52579896.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (69897517) and next prime (69897533).

It is not a de Polignac number, because 69897525 - 2³ = 69897517 is a prime.

It is a super-2 number, since 2×69897525² = 9771328002251250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 465909 + ... + 466058.

It is an arithmetic number, because the mean of its divisors is an integer number (9630336).

Almost surely, 2^69897525 is an apocalyptic number.

It is an amenable number.

69897525 is a deficient number, since it is larger than the sum of its proper divisors (45666507).

69897525 is a wasteful number, since it uses less digits than its factorization.

69897525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931980 (or 931975 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 51.

The square root of 69897525 is about 8360.4739698177. The cubic root of 69897525 is about 411.9273228546.

Adding to 69897525 its sum of digits (51), we get a triangular number (69897576 = T₁₁₈₂₃).

The spelling of 69897525 in words is "sixty-nine million, eight hundred ninety-seven thousand, five hundred twenty-five".