69931409 has 2 divisors, whose sum is σ = 69931410. Its totient is φ = 69931408.

The previous prime is 69931391. The next prime is 69931429. The reversal of 69931409 is 90413996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65157184 + 4774225 = 8072^2 + 2185^2 .

It is a cyclic number.

It is not a de Polignac number, because 69931409 - 2¹² = 69927313 is a prime.

It is not a weakly prime, because it can be changed into another prime (69931429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34965704 + 34965705.

It is an arithmetic number, because the mean of its divisors is an integer number (34965705).

Almost surely, 2^69931409 is an apocalyptic number.

It is an amenable number.

69931409 is a deficient number, since it is larger than the sum of its proper divisors (1).

69931409 is an equidigital number, since it uses as much as digits as its factorization.

69931409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 69931409 is about 8362.5001644245. The cubic root of 69931409 is about 411.9938749993.

The spelling of 69931409 in words is "sixty-nine million, nine hundred thirty-one thousand, four hundred nine".