80994391 has 2 divisors, whose sum is σ = 80994392. Its totient is φ = 80994390.

The previous prime is 80994373. The next prime is 80994439. The reversal of 80994391 is 19349908.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80994391 - 2¹⁵ = 80961623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80994371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40497195 + 40497196.

It is an arithmetic number, because the mean of its divisors is an integer number (40497196).

Almost surely, 2^80994391 is an apocalyptic number.

80994391 is a deficient number, since it is larger than the sum of its proper divisors (1).

80994391 is an equidigital number, since it uses as much as digits as its factorization.

80994391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 80994391 is about 8999.6883834942. The cubic root of 80994391 is about 432.6648837286.

The spelling of 80994391 in words is "eighty million, nine hundred ninety-four thousand, three hundred ninety-one".