977928361 has 2 divisors, whose sum is σ = 977928362. Its totient is φ = 977928360.

The previous prime is 977928353. The next prime is 977928409. The reversal of 977928361 is 163829779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 573315136 + 404613225 = 23944^2 + 20115^2 .

It is a cyclic number.

It is not a de Polignac number, because 977928361 - 2³ = 977928353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 977928299 and 977928308.

It is not a weakly prime, because it can be changed into another prime (977928311) 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, 488964180 + 488964181.

It is an arithmetic number, because the mean of its divisors is an integer number (488964181).

Almost surely, 2^977928361 is an apocalyptic number.

It is an amenable number.

977928361 is a deficient number, since it is larger than the sum of its proper divisors (1).

977928361 is an equidigital number, since it uses as much as digits as its factorization.

977928361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 52.

The square root of 977928361 is about 31271.8461399387. The cubic root of 977928361 is about 992.5879847638.

The spelling of 977928361 in words is "nine hundred seventy-seven million, nine hundred twenty-eight thousand, three hundred sixty-one".