82770931 has 2 divisors, whose sum is σ = 82770932. Its totient is φ = 82770930.

The previous prime is 82770893. The next prime is 82770937. The reversal of 82770931 is 13907728.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82770931 - 2¹³ = 82762739 is a prime.

It is a super-2 number, since 2×82770931² = 13702054037213522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82770937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41385465 + 41385466.

It is an arithmetic number, because the mean of its divisors is an integer number (41385466).

Almost surely, 2^82770931 is an apocalyptic number.

82770931 is a deficient number, since it is larger than the sum of its proper divisors (1).

82770931 is an equidigital number, since it uses as much as digits as its factorization.

82770931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 82770931 is about 9097.8530983963. The cubic root of 82770931 is about 435.8054061766.

The spelling of 82770931 in words is "eighty-two million, seven hundred seventy thousand, nine hundred thirty-one".