102290891 has 2 divisors, whose sum is σ = 102290892. Its totient is φ = 102290890.

The previous prime is 102290879. The next prime is 102290893. The reversal of 102290891 is 198092201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102290891 - 2⁶ = 102290827 is a prime.

Together with 102290893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102290893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51145445 + 51145446.

It is an arithmetic number, because the mean of its divisors is an integer number (51145446).

Almost surely, 2^102290891 is an apocalyptic number.

102290891 is a deficient number, since it is larger than the sum of its proper divisors (1).

102290891 is an equidigital number, since it uses as much as digits as its factorization.

102290891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 102290891 is about 10113.8959357905. The cubic root of 102290891 is about 467.6766141393.

The spelling of 102290891 in words is "one hundred two million, two hundred ninety thousand, eight hundred ninety-one".