931345609 has 2 divisors, whose sum is σ = 931345610. Its totient is φ = 931345608.

The previous prime is 931345567. The next prime is 931345631. The reversal of 931345609 is 906543139.

931345609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 909927225 + 21418384 = 30165^2 + 4628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-931345609 is a prime.

It is not a weakly prime, because it can be changed into another prime (931345409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 465672804 + 465672805.

It is an arithmetic number, because the mean of its divisors is an integer number (465672805).

Almost surely, 2^931345609 is an apocalyptic number.

It is an amenable number.

931345609 is a deficient number, since it is larger than the sum of its proper divisors (1).

931345609 is an equidigital number, since it uses as much as digits as its factorization.

931345609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 931345609 is about 30517.9555180225. The cubic root of 931345609 is about 976.5705510346.

The spelling of 931345609 in words is "nine hundred thirty-one million, three hundred forty-five thousand, six hundred nine".