80764991 has 8 divisors (see below), whose sum is σ = 85812480. Its totient is φ = 75797208.

The previous prime is 80764987. The next prime is 80764997. The reversal of 80764991 is 19946708.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80764991 - 2² = 80764987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80764997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17831 + ... + 21896.

It is an arithmetic number, because the mean of its divisors is an integer number (10726560).

Almost surely, 2^80764991 is an apocalyptic number.

80764991 is a deficient number, since it is larger than the sum of its proper divisors (5047489).

80764991 is a wasteful number, since it uses less digits than its factorization.

80764991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39853.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 80764991 is about 8986.9344606490. The cubic root of 80764991 is about 432.2560192968.

The spelling of 80764991 in words is "eighty million, seven hundred sixty-four thousand, nine hundred ninety-one".