69990913 has 2 divisors, whose sum is σ = 69990914. Its totient is φ = 69990912.

The previous prime is 69990881. The next prime is 69990929. The reversal of 69990913 is 31909996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45319824 + 24671089 = 6732^2 + 4967^2 .

It is a cyclic number.

It is not a de Polignac number, because 69990913 - 2⁵ = 69990881 is a prime.

It is not a weakly prime, because it can be changed into another prime (69990953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34995456 + 34995457.

It is an arithmetic number, because the mean of its divisors is an integer number (34995457).

Almost surely, 2^69990913 is an apocalyptic number.

It is an amenable number.

69990913 is a deficient number, since it is larger than the sum of its proper divisors (1).

69990913 is an equidigital number, since it uses as much as digits as its factorization.

69990913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098, while the sum is 46.

The square root of 69990913 is about 8366.0571955970. The cubic root of 69990913 is about 412.1106958189.

The spelling of 69990913 in words is "sixty-nine million, nine hundred ninety thousand, nine hundred thirteen".