80293991 has 2 divisors, whose sum is σ = 80293992. Its totient is φ = 80293990.

The previous prime is 80293973. The next prime is 80294003. The reversal of 80293991 is 19939208.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80293991 - 2²⁶ = 13185127 is a prime.

It is a Sophie Germain prime.

It is equal to p_4685549 and since 80293991 and 4685549 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80293891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40146995 + 40146996.

It is an arithmetic number, because the mean of its divisors is an integer number (40146996).

Almost surely, 2^80293991 is an apocalyptic number.

80293991 is a deficient number, since it is larger than the sum of its proper divisors (1).

80293991 is an equidigital number, since it uses as much as digits as its factorization.

80293991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 80293991 is about 8960.6914353748. The cubic root of 80293991 is about 431.4141131038.

The spelling of 80293991 in words is "eighty million, two hundred ninety-three thousand, nine hundred ninety-one".