120867831 has 12 divisors (see below), whose sum is σ = 199527952. Its totient is φ = 69067296.

The previous prime is 120867823. The next prime is 120867833. The reversal of 120867831 is 138768021.

It is not a de Polignac number, because 120867831 - 2³ = 120867823 is a prime.

It is a super-2 number, since 2×120867831² = 29218065141289122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120867833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 959206 + ... + 959331.

Almost surely, 2^120867831 is an apocalyptic number.

120867831 is a deficient number, since it is larger than the sum of its proper divisors (78660121).

120867831 is a wasteful number, since it uses less digits than its factorization.

120867831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918550 (or 1918547 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 120867831 is about 10993.9906767288. The cubic root of 120867831 is about 494.4285907171.

The spelling of 120867831 in words is "one hundred twenty million, eight hundred sixty-seven thousand, eight hundred thirty-one".