690352387 has 2 divisors, whose sum is σ = 690352388. Its totient is φ = 690352386.

The previous prime is 690352379. The next prime is 690352447. The reversal of 690352387 is 783253096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690352387 - 2³ = 690352379 is a prime.

It is not a weakly prime, because it can be changed into another prime (690352307) 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, 345176193 + 345176194.

It is an arithmetic number, because the mean of its divisors is an integer number (345176194).

Almost surely, 2^690352387 is an apocalyptic number.

690352387 is a deficient number, since it is larger than the sum of its proper divisors (1).

690352387 is an equidigital number, since it uses as much as digits as its factorization.

690352387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 690352387 is about 26274.5577888573. The cubic root of 690352387 is about 883.8059959838.

The spelling of 690352387 in words is "six hundred ninety million, three hundred fifty-two thousand, three hundred eighty-seven".