912020139 has 12 divisors (see below), whose sum is σ = 1319614296. Its totient is φ = 606974112.

The previous prime is 912020117. The next prime is 912020167. The reversal of 912020139 is 931020219.

It is not a de Polignac number, because 912020139 - 2⁵ = 912020107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (912010139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81034 + ... + 91599.

It is an arithmetic number, because the mean of its divisors is an integer number (109967858).

Almost surely, 2^912020139 is an apocalyptic number.

912020139 is a deficient number, since it is larger than the sum of its proper divisors (407594157).

912020139 is a wasteful number, since it uses less digits than its factorization.

912020139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173226 (or 173223 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 912020139 is about 30199.6711737065. The cubic root of 912020139 is about 969.7686552833.

The spelling of 912020139 in words is "nine hundred twelve million, twenty thousand, one hundred thirty-nine".