80818379 has 2 divisors, whose sum is σ = 80818380. Its totient is φ = 80818378.

The previous prime is 80818369. The next prime is 80818393. The reversal of 80818379 is 97381808.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80818379 - 2²⁰ = 79769803 is a prime.

It is a super-2 number, since 2×80818379² = 13063220768375282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80818349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40409189 + 40409190.

It is an arithmetic number, because the mean of its divisors is an integer number (40409190).

Almost surely, 2^80818379 is an apocalyptic number.

80818379 is a deficient number, since it is larger than the sum of its proper divisors (1).

80818379 is an equidigital number, since it uses as much as digits as its factorization.

80818379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 80818379 is about 8989.9042820266. The cubic root of 80818379 is about 432.3512429039.

The spelling of 80818379 in words is "eighty million, eight hundred eighteen thousand, three hundred seventy-nine".