69690913 has 4 divisors (see below), whose sum is σ = 69717780. Its totient is φ = 69664048.

The previous prime is 69690893. The next prime is 69690961. The reversal of 69690913 is 31909696.

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 58721569 + 10969344 = 7663^2 + 3312^2 .

It is a cyclic number.

It is not a de Polignac number, because 69690913 - 2²¹ = 67593761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 69690913.

It is not an unprimeable number, because it can be changed into a prime (69690113) 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 3 ways as a sum of consecutive naturals, for example, 9070 + ... + 14887.

It is an arithmetic number, because the mean of its divisors is an integer number (17429445).

Almost surely, 2^69690913 is an apocalyptic number.

It is an amenable number.

69690913 is a deficient number, since it is larger than the sum of its proper divisors (26867).

69690913 is a wasteful number, since it uses less digits than its factorization.

69690913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26866.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 69690913 is about 8348.1083486021. The cubic root of 69690913 is about 411.5210465483.

The spelling of 69690913 in words is "sixty-nine million, six hundred ninety thousand, nine hundred thirteen".