102920906 has 48 divisors (see below), whose sum is σ = 181617984. Its totient is φ = 43656800.

The previous prime is 102920903. The next prime is 102920921. The reversal of 102920906 is 609029201.

It is not an unprimeable number, because it can be changed into a prime (102920903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2510246 + ... + 2510286.

It is an arithmetic number, because the mean of its divisors is an integer number (3783708).

Almost surely, 2^102920906 is an apocalyptic number.

102920906 is a deficient number, since it is larger than the sum of its proper divisors (78697078).

102920906 is an equidigital number, since it uses as much as digits as its factorization.

102920906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 102920906 is about 10144.9941350402. The cubic root of 102920906 is about 468.6347979772.

The spelling of 102920906 in words is "one hundred two million, nine hundred twenty thousand, nine hundred six".