977943061 has 2 divisors, whose sum is σ = 977943062. Its totient is φ = 977943060.

The previous prime is 977942989. The next prime is 977943073. The reversal of 977943061 is 160349779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 880308900 + 97634161 = 29670^2 + 9881^2 .

It is an emirp because it is prime and its reverse (160349779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 977943061 - 2¹⁵ = 977910293 is a prime.

It is a super-3 number, since 3×977943061³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (977943961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488971530 + 488971531.

It is an arithmetic number, because the mean of its divisors is an integer number (488971531).

Almost surely, 2^977943061 is an apocalyptic number.

It is an amenable number.

977943061 is a deficient number, since it is larger than the sum of its proper divisors (1).

977943061 is an equidigital number, since it uses as much as digits as its factorization.

977943061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 977943061 is about 31272.0811747475. The cubic root of 977943061 is about 992.5929581923.

The spelling of 977943061 in words is "nine hundred seventy-seven million, nine hundred forty-three thousand, sixty-one".