83967161 has 2 divisors, whose sum is σ = 83967162. Its totient is φ = 83967160.

The previous prime is 83967157. The next prime is 83967179. The reversal of 83967161 is 16176938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48385936 + 35581225 = 6956^2 + 5965^2 .

It is a cyclic number.

It is not a de Polignac number, because 83967161 - 2² = 83967157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (83967101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41983580 + 41983581.

It is an arithmetic number, because the mean of its divisors is an integer number (41983581).

Almost surely, 2^83967161 is an apocalyptic number.

It is an amenable number.

83967161 is a deficient number, since it is larger than the sum of its proper divisors (1).

83967161 is an equidigital number, since it uses as much as digits as its factorization.

83967161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 83967161 is about 9163.3597004592. The cubic root of 83967161 is about 437.8948355068.

The spelling of 83967161 in words is "eighty-three million, nine hundred sixty-seven thousand, one hundred sixty-one".