1977056797 has 2 divisors, whose sum is σ = 1977056798. Its totient is φ = 1977056796.

The previous prime is 1977056791. The next prime is 1977056821. The reversal of 1977056797 is 7976507791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1853646916 + 123409881 = 43054^2 + 11109^2 .

It is a cyclic number.

It is not a de Polignac number, because 1977056797 - 2³ = 1977056789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1977056791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988528398 + 988528399.

It is an arithmetic number, because the mean of its divisors is an integer number (988528399).

Almost surely, 2^1977056797 is an apocalyptic number.

It is an amenable number.

1977056797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977056797 is an equidigital number, since it uses as much as digits as its factorization.

1977056797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5834430, while the sum is 58.

The square root of 1977056797 is about 44464.1068391124. The cubic root of 1977056797 is about 1255.0847383300.

It can be divided in two parts, 19770 and 56797, that added together give a palindrome (76567).

The spelling of 1977056797 in words is "one billion, nine hundred seventy-seven million, fifty-six thousand, seven hundred ninety-seven".