80537491 has 2 divisors, whose sum is σ = 80537492. Its totient is φ = 80537490.

The previous prime is 80537477. The next prime is 80537497. The reversal of 80537491 is 19473508.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80537491 - 2⁷ = 80537363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80537491.

It is not a weakly prime, because it can be changed into another prime (80537497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40268745 + 40268746.

It is an arithmetic number, because the mean of its divisors is an integer number (40268746).

Almost surely, 2^80537491 is an apocalyptic number.

80537491 is a deficient number, since it is larger than the sum of its proper divisors (1).

80537491 is an equidigital number, since it uses as much as digits as its factorization.

80537491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 80537491 is about 8974.2682710068. The cubic root of 80537491 is about 431.8497759420.

The spelling of 80537491 in words is "eighty million, five hundred thirty-seven thousand, four hundred ninety-one".