772799947 has 2 divisors, whose sum is σ = 772799948. Its totient is φ = 772799946.

The previous prime is 772799941. The next prime is 772799981. The reversal of 772799947 is 749997277.

It is a weak prime.

It is an emirp because it is prime and its reverse (749997277) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-772799947 is a prime.

It is not a weakly prime, because it can be changed into another prime (772799941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386399973 + 386399974.

It is an arithmetic number, because the mean of its divisors is an integer number (386399974).

Almost surely, 2^772799947 is an apocalyptic number.

772799947 is a deficient number, since it is larger than the sum of its proper divisors (1).

772799947 is an equidigital number, since it uses as much as digits as its factorization.

772799947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14002632, while the sum is 61.

The square root of 772799947 is about 27799.2796129684. The cubic root of 772799947 is about 917.6752691766.

The spelling of 772799947 in words is "seven hundred seventy-two million, seven hundred ninety-nine thousand, nine hundred forty-seven".