102931691 has 2 divisors, whose sum is σ = 102931692. Its totient is φ = 102931690.

The previous prime is 102931667. The next prime is 102931727. The reversal of 102931691 is 196139201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102931691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102901691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51465845 + 51465846.

It is an arithmetic number, because the mean of its divisors is an integer number (51465846).

Almost surely, 2^102931691 is an apocalyptic number.

102931691 is a deficient number, since it is larger than the sum of its proper divisors (1).

102931691 is an equidigital number, since it uses as much as digits as its factorization.

102931691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 102931691 is about 10145.5256640551. The cubic root of 102931691 is about 468.6511666949.

The spelling of 102931691 in words is "one hundred two million, nine hundred thirty-one thousand, six hundred ninety-one".