76585981 has 2 divisors, whose sum is σ = 76585982. Its totient is φ = 76585980.

The previous prime is 76585973. The next prime is 76586011. The reversal of 76585981 is 18958567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40525956 + 36060025 = 6366^2 + 6005^2 .

It is an emirp because it is prime and its reverse (18958567) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76585981 - 2³ = 76585973 is a prime.

It is a super-2 number, since 2×76585981² = 11730824971464722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76585921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38292990 + 38292991.

It is an arithmetic number, because the mean of its divisors is an integer number (38292991).

Almost surely, 2^76585981 is an apocalyptic number.

It is an amenable number.

76585981 is a deficient number, since it is larger than the sum of its proper divisors (1).

76585981 is an equidigital number, since it uses as much as digits as its factorization.

76585981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 49.

The square root of 76585981 is about 8751.3416685672. The cubic root of 76585981 is about 424.6682181047.

The spelling of 76585981 in words is "seventy-six million, five hundred eighty-five thousand, nine hundred eighty-one".