690622734517 has 2 divisors, whose sum is σ = 690622734518. Its totient is φ = 690622734516.

The previous prime is 690622734467. The next prime is 690622734521. The reversal of 690622734517 is 715437226096.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660471537636 + 30151196881 = 812694^2 + 173641^2 .

It is a cyclic number.

It is not a de Polignac number, because 690622734517 - 2¹⁵ = 690622701749 is a prime.

It is a super-2 number, since 2×690622734517² (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 (690622734547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345311367258 + 345311367259.

It is an arithmetic number, because the mean of its divisors is an integer number (345311367259).

Almost surely, 2^690622734517 is an apocalyptic number.

It is an amenable number.

690622734517 is a deficient number, since it is larger than the sum of its proper divisors (1).

690622734517 is an equidigital number, since it uses as much as digits as its factorization.

690622734517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 690622734517 in words is "six hundred ninety billion, six hundred twenty-two million, seven hundred thirty-four thousand, five hundred seventeen".