690622734917 has 2 divisors, whose sum is σ = 690622734918. Its totient is φ = 690622734916.

The previous prime is 690622734833. The next prime is 690622734929. The reversal of 690622734917 is 719437226096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 361346456641 + 329276278276 = 601121^2 + 573826^2 .

It is a cyclic number.

It is not a de Polignac number, because 690622734917 - 2¹⁶ = 690622669381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690622734517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345311367458 + 345311367459.

It is an arithmetic number, because the mean of its divisors is an integer number (345311367459).

Almost surely, 2^690622734917 is an apocalyptic number.

It is an amenable number.

690622734917 is a deficient number, since it is larger than the sum of its proper divisors (1).

690622734917 is an equidigital number, since it uses as much as digits as its factorization.

690622734917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6858432, while the sum is 56.

The spelling of 690622734917 in words is "six hundred ninety billion, six hundred twenty-two million, seven hundred thirty-four thousand, nine hundred seventeen".