80479657 has 2 divisors, whose sum is σ = 80479658. Its totient is φ = 80479656.

The previous prime is 80479621. The next prime is 80479661. The reversal of 80479657 is 75697408.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75533481 + 4946176 = 8691^2 + 2224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80479657 is a prime.

It is not a weakly prime, because it can be changed into another prime (80479757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40239828 + 40239829.

It is an arithmetic number, because the mean of its divisors is an integer number (40239829).

Almost surely, 2^80479657 is an apocalyptic number.

It is an amenable number.

80479657 is a deficient number, since it is larger than the sum of its proper divisors (1).

80479657 is an equidigital number, since it uses as much as digits as its factorization.

80479657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 80479657 is about 8971.0454797643. The cubic root of 80479657 is about 431.7463806978.

The spelling of 80479657 in words is "eighty million, four hundred seventy-nine thousand, six hundred fifty-seven".