69897813 has 8 divisors (see below), whose sum is σ = 93791328. Its totient is φ = 46301424.

The previous prime is 69897809. The next prime is 69897853. The reversal of 69897813 is 31879896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 69897813 - 2² = 69897809 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69897803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73731 + ... + 74672.

It is an arithmetic number, because the mean of its divisors is an integer number (11723916).

Almost surely, 2^69897813 is an apocalyptic number.

It is an amenable number.

69897813 is a deficient number, since it is larger than the sum of its proper divisors (23893515).

69897813 is a wasteful number, since it uses less digits than its factorization.

69897813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148563.

The product of its digits is 653184, while the sum is 51.

The square root of 69897813 is about 8360.4911937039. The cubic root of 69897813 is about 411.9278886109.

The spelling of 69897813 in words is "sixty-nine million, eight hundred ninety-seven thousand, eight hundred thirteen".