69664039 has 2 divisors, whose sum is σ = 69664040. Its totient is φ = 69664038.

The previous prime is 69664031. The next prime is 69664069. The reversal of 69664039 is 93046696.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69664039 - 2³ = 69664031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 69663986 and 69664004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69664031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34832019 + 34832020.

It is an arithmetic number, because the mean of its divisors is an integer number (34832020).

Almost surely, 2^69664039 is an apocalyptic number.

69664039 is a deficient number, since it is larger than the sum of its proper divisors (1).

69664039 is an equidigital number, since it uses as much as digits as its factorization.

69664039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 69664039 is about 8346.4986072005. The cubic root of 69664039 is about 411.4681432454.

The spelling of 69664039 in words is "sixty-nine million, six hundred sixty-four thousand, thirty-nine".