82153961 has 2 divisors, whose sum is σ = 82153962. Its totient is φ = 82153960.

The previous prime is 82153913. The next prime is 82153987. The reversal of 82153961 is 16935128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66504025 + 15649936 = 8155^2 + 3956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82153961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82153261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41076980 + 41076981.

It is an arithmetic number, because the mean of its divisors is an integer number (41076981).

Almost surely, 2^82153961 is an apocalyptic number.

It is an amenable number.

82153961 is a deficient number, since it is larger than the sum of its proper divisors (1).

82153961 is an equidigital number, since it uses as much as digits as its factorization.

82153961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 82153961 is about 9063.8822256250. The cubic root of 82153961 is about 434.7198813110.

The spelling of 82153961 in words is "eighty-two million, one hundred fifty-three thousand, nine hundred sixty-one".