69955939 has 2 divisors, whose sum is σ = 69955940. Its totient is φ = 69955938.

The previous prime is 69955889. The next prime is 69955943. The reversal of 69955939 is 93955996.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 69955939 - 2⁹ = 69955427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69955939.

It is not a weakly prime, because it can be changed into another prime (69955979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34977969 + 34977970.

It is an arithmetic number, because the mean of its divisors is an integer number (34977970).

Almost surely, 2^69955939 is an apocalyptic number.

69955939 is a deficient number, since it is larger than the sum of its proper divisors (1).

69955939 is an equidigital number, since it uses as much as digits as its factorization.

69955939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2952450, while the sum is 55.

The square root of 69955939 is about 8363.9667024684. The cubic root of 69955939 is about 412.0420413786.

The spelling of 69955939 in words is "sixty-nine million, nine hundred fifty-five thousand, nine hundred thirty-nine".