690790230391 has 2 divisors, whose sum is σ = 690790230392. Its totient is φ = 690790230390.

The previous prime is 690790230371. The next prime is 690790230401. The reversal of 690790230391 is 193032097096.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690790230391 - 2¹⁵ = 690790197623 is a prime.

It is a super-2 number, since 2×690790230391² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690790230371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345395115195 + 345395115196.

It is an arithmetic number, because the mean of its divisors is an integer number (345395115196).

Almost surely, 2^690790230391 is an apocalyptic number.

690790230391 is a deficient number, since it is larger than the sum of its proper divisors (1).

690790230391 is an equidigital number, since it uses as much as digits as its factorization.

690790230391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 551124, while the sum is 49.

The spelling of 690790230391 in words is "six hundred ninety billion, seven hundred ninety million, two hundred thirty thousand, three hundred ninety-one".