80967977 has 2 divisors, whose sum is σ = 80967978. Its totient is φ = 80967976.

The previous prime is 80967973. The next prime is 80968007. The reversal of 80967977 is 77976908.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79370281 + 1597696 = 8909^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 80967977 - 2² = 80967973 is a prime.

It is not a weakly prime, because it can be changed into another prime (80967973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40483988 + 40483989.

It is an arithmetic number, because the mean of its divisors is an integer number (40483989).

Almost surely, 2^80967977 is an apocalyptic number.

It is an amenable number.

80967977 is a deficient number, since it is larger than the sum of its proper divisors (1).

80967977 is an equidigital number, since it uses as much as digits as its factorization.

80967977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1333584, while the sum is 53.

The square root of 80967977 is about 8998.2207685742. The cubic root of 80967977 is about 432.6178448630.

It can be divided in two parts, 809 and 67977, that added together give a palindrome (68786).

The spelling of 80967977 in words is "eighty million, nine hundred sixty-seven thousand, nine hundred seventy-seven".