80491901 has 4 divisors (see below), whose sum is σ = 91990752. Its totient is φ = 68993052.

The previous prime is 80491877. The next prime is 80491913. The reversal of 80491901 is 10919408.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80491901 - 2⁶ = 80491837 is a prime.

It is a super-2 number, since 2×80491901² = 12957892253187602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80491921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5749415 + ... + 5749428.

It is an arithmetic number, because the mean of its divisors is an integer number (22997688).

Almost surely, 2^80491901 is an apocalyptic number.

It is an amenable number.

80491901 is a deficient number, since it is larger than the sum of its proper divisors (11498851).

80491901 is a wasteful number, since it uses less digits than its factorization.

80491901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11498850.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 80491901 is about 8971.7278714861. The cubic root of 80491901 is about 431.7682745727.

The spelling of 80491901 in words is "eighty million, four hundred ninety-one thousand, nine hundred one".