977970811 has 2 divisors, whose sum is σ = 977970812. Its totient is φ = 977970810.

The previous prime is 977970803. The next prime is 977970821. The reversal of 977970811 is 118079779.

It is a weak prime.

It is an emirp because it is prime and its reverse (118079779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 977970811 - 2³ = 977970803 is a prime.

It is a super-3 number, since 3×977970811³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (977970821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488985405 + 488985406.

It is an arithmetic number, because the mean of its divisors is an integer number (488985406).

Almost surely, 2^977970811 is an apocalyptic number.

977970811 is a deficient number, since it is larger than the sum of its proper divisors (1).

977970811 is an equidigital number, since it uses as much as digits as its factorization.

977970811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 49.

The square root of 977970811 is about 31272.5248580923. The cubic root of 977970811 is about 992.6023466714.

The spelling of 977970811 in words is "nine hundred seventy-seven million, nine hundred seventy thousand, eight hundred eleven".