977805481 has 2 divisors, whose sum is σ = 977805482. Its totient is φ = 977805480.

The previous prime is 977805457. The next prime is 977805523. The reversal of 977805481 is 184508779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 682515625 + 295289856 = 26125^2 + 17184^2 .

It is a cyclic number.

It is not a de Polignac number, because 977805481 - 2²³ = 969416873 is a prime.

It is a super-2 number, since 2×977805481² = 1912207117347282722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (977805431) 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, 488902740 + 488902741.

It is an arithmetic number, because the mean of its divisors is an integer number (488902741).

Almost surely, 2^977805481 is an apocalyptic number.

It is an amenable number.

977805481 is a deficient number, since it is larger than the sum of its proper divisors (1).

977805481 is an equidigital number, since it uses as much as digits as its factorization.

977805481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 977805481 is about 31269.8813716970. The cubic root of 977805481 is about 992.5464090120.

The spelling of 977805481 in words is "nine hundred seventy-seven million, eight hundred five thousand, four hundred eighty-one".