104057981 has 2 divisors, whose sum is σ = 104057982. Its totient is φ = 104057980.

The previous prime is 104057963. The next prime is 104057983. The reversal of 104057981 is 189750401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78605956 + 25452025 = 8866^2 + 5045^2 .

It is a cyclic number.

It is not a de Polignac number, because 104057981 - 2¹⁰ = 104056957 is a prime.

It is a super-2 number, since 2×104057981² = 21656126819592722, which contains 22 as substring.

Together with 104057983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104057983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52028990 + 52028991.

It is an arithmetic number, because the mean of its divisors is an integer number (52028991).

Almost surely, 2^104057981 is an apocalyptic number.

It is an amenable number.

104057981 is a deficient number, since it is larger than the sum of its proper divisors (1).

104057981 is an equidigital number, since it uses as much as digits as its factorization.

104057981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 104057981 is about 10200.8813834884. The cubic root of 104057981 is about 470.3543140882.

The spelling of 104057981 in words is "one hundred four million, fifty-seven thousand, nine hundred eighty-one".