772946857897 has 2 divisors, whose sum is σ = 772946857898. Its totient is φ = 772946857896.

The previous prime is 772946857877. The next prime is 772946857919. The reversal of 772946857897 is 798758649277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480753636496 + 292193221401 = 693364^2 + 540549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-772946857897 is a prime.

It is a super-2 number, since 2×772946857897² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (772946857847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386473428948 + 386473428949.

It is an arithmetic number, because the mean of its divisors is an integer number (386473428949).

Almost surely, 2^772946857897 is an apocalyptic number.

It is an amenable number.

772946857897 is a deficient number, since it is larger than the sum of its proper divisors (1).

772946857897 is an equidigital number, since it uses as much as digits as its factorization.

772946857897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2987228160, while the sum is 79.

The spelling of 772946857897 in words is "seven hundred seventy-two billion, nine hundred forty-six million, eight hundred fifty-seven thousand, eight hundred ninety-seven".