927981139 has 2 divisors, whose sum is σ = 927981140. Its totient is φ = 927981138.

The previous prime is 927981133. The next prime is 927981143. The reversal of 927981139 is 931189729.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 927981139 - 2⁷ = 927981011 is a prime.

It is a super-2 number, since 2×927981139² = 1722297988679474642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 927981092 and 927981101.

It is not a weakly prime, because it can be changed into another prime (927981133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 463990569 + 463990570.

It is an arithmetic number, because the mean of its divisors is an integer number (463990570).

Almost surely, 2^927981139 is an apocalyptic number.

927981139 is a deficient number, since it is larger than the sum of its proper divisors (1).

927981139 is an equidigital number, since it uses as much as digits as its factorization.

927981139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 49.

The square root of 927981139 is about 30462.7828505539. The cubic root of 927981139 is about 975.3931840465.

The spelling of 927981139 in words is "nine hundred twenty-seven million, nine hundred eighty-one thousand, one hundred thirty-nine".