102690961 has 2 divisors, whose sum is σ = 102690962. Its totient is φ = 102690960.

The previous prime is 102690919. The next prime is 102690979. The reversal of 102690961 is 169096201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100881936 + 1809025 = 10044^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 102690961 - 2⁹ = 102690449 is a prime.

It is a super-2 number, since 2×102690961² = 21090866942207042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102690061) 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, 51345480 + 51345481.

It is an arithmetic number, because the mean of its divisors is an integer number (51345481).

Almost surely, 2^102690961 is an apocalyptic number.

It is an amenable number.

102690961 is a deficient number, since it is larger than the sum of its proper divisors (1).

102690961 is an equidigital number, since it uses as much as digits as its factorization.

102690961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 102690961 is about 10133.6548688023. The cubic root of 102690961 is about 468.2855311311.

The spelling of 102690961 in words is "one hundred two million, six hundred ninety thousand, nine hundred sixty-one".