102791906 has 12 divisors (see below), whose sum is σ = 179361558. Its totient is φ = 44053632.

The previous prime is 102791873. The next prime is 102791947. The reversal of 102791906 is 609197201.

It can be written as a sum of positive squares in only one way, i.e., 64240225 + 38551681 = 8015^2 + 6209^2 .

It is a super-2 number, since 2×102791906² = 21132351878225672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 524351 + ... + 524546.

Almost surely, 2^102791906 is an apocalyptic number.

102791906 is a deficient number, since it is larger than the sum of its proper divisors (76569652).

102791906 is a wasteful number, since it uses less digits than its factorization.

102791906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048913 (or 1048906 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 102791906 is about 10138.6343261802. The cubic root of 102791906 is about 468.4389221138.

The spelling of 102791906 in words is "one hundred two million, seven hundred ninety-one thousand, nine hundred six".