972339139 has 2 divisors, whose sum is σ = 972339140. Its totient is φ = 972339138.

The previous prime is 972339133. The next prime is 972339161. The reversal of 972339139 is 931933279.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 972339139 - 2³ = 972339131 is a prime.

It is a super-2 number, since 2×972339139² = 1890886802462522642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (972339131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486169569 + 486169570.

It is an arithmetic number, because the mean of its divisors is an integer number (486169570).

Almost surely, 2^972339139 is an apocalyptic number.

972339139 is a deficient number, since it is larger than the sum of its proper divisors (1).

972339139 is an equidigital number, since it uses as much as digits as its factorization.

972339139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562, while the sum is 46.

The square root of 972339139 is about 31182.3530061476. The cubic root of 972339139 is about 990.6933682994.

The spelling of 972339139 in words is "nine hundred seventy-two million, three hundred thirty-nine thousand, one hundred thirty-nine".