82999181 has 2 divisors, whose sum is σ = 82999182. Its totient is φ = 82999180.

The previous prime is 82999153. The next prime is 82999187. The reversal of 82999181 is 18199928.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73444900 + 9554281 = 8570^2 + 3091^2 .

It is a cyclic number.

It is not a de Polignac number, because 82999181 - 2¹⁸ = 82737037 is a prime.

It is a super-2 number, since 2×82999181² = 13777728093341522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82999187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41499590 + 41499591.

It is an arithmetic number, because the mean of its divisors is an integer number (41499591).

Almost surely, 2^82999181 is an apocalyptic number.

It is an amenable number.

82999181 is a deficient number, since it is larger than the sum of its proper divisors (1).

82999181 is an equidigital number, since it uses as much as digits as its factorization.

82999181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 47.

The square root of 82999181 is about 9110.3886305690. The cubic root of 82999181 is about 436.2056323874.

The spelling of 82999181 in words is "eighty-two million, nine hundred ninety-nine thousand, one hundred eighty-one".