102057091 has 2 divisors, whose sum is σ = 102057092. Its totient is φ = 102057090.

The previous prime is 102057089. The next prime is 102057097. The reversal of 102057091 is 190750201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102057091 - 2¹ = 102057089 is a prime.

Together with 102057089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (102057097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51028545 + 51028546.

It is an arithmetic number, because the mean of its divisors is an integer number (51028546).

Almost surely, 2^102057091 is an apocalyptic number.

102057091 is a deficient number, since it is larger than the sum of its proper divisors (1).

102057091 is an equidigital number, since it uses as much as digits as its factorization.

102057091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 102057091 is about 10102.3309686428. The cubic root of 102057091 is about 467.3200290993.

The spelling of 102057091 in words is "one hundred two million, fifty-seven thousand, ninety-one".