80557973 has 2 divisors, whose sum is σ = 80557974. Its totient is φ = 80557972.

The previous prime is 80557957. The next prime is 80557979. The reversal of 80557973 is 37975508.

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., 78464164 + 2093809 = 8858^2 + 1447^2 .

It is a cyclic number.

It is not a de Polignac number, because 80557973 - 2⁴ = 80557957 is a prime.

It is a super-3 number, since 3×80557973³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80557979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40278986 + 40278987.

It is an arithmetic number, because the mean of its divisors is an integer number (40278987).

Almost surely, 2^80557973 is an apocalyptic number.

It is an amenable number.

80557973 is a deficient number, since it is larger than the sum of its proper divisors (1).

80557973 is an equidigital number, since it uses as much as digits as its factorization.

80557973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 80557973 is about 8975.4093499962. The cubic root of 80557973 is about 431.8863816573.

The spelling of 80557973 in words is "eighty million, five hundred fifty-seven thousand, nine hundred seventy-three".