69897990 has 32 divisors (see below), whose sum is σ = 170924256. Its totient is φ = 18287360.

The previous prime is 69897983. The next prime is 69897991. The reversal of 69897990 is 9979896.

It is a self number, because there is not a number n which added to its sum of digits gives 69897990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69897991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20391 + ... + 23570.

It is an arithmetic number, because the mean of its divisors is an integer number (5341383).

Almost surely, 2^69897990 is an apocalyptic number.

69897990 is an abundant number, since it is smaller than the sum of its proper divisors (101026266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

69897990 is a wasteful number, since it uses less digits than its factorization.

69897990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44024.

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 69897990 is about 8360.5017791996. The cubic root of 69897990 is about 411.9282363146.

The spelling of 69897990 in words is "sixty-nine million, eight hundred ninety-seven thousand, nine hundred ninety".