772877849 has 2 divisors, whose sum is σ = 772877850. Its totient is φ = 772877848.

The previous prime is 772877827. The next prime is 772877857. The reversal of 772877849 is 948778277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 750486025 + 22391824 = 27395^2 + 4732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-772877849 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (772877249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386438924 + 386438925.

It is an arithmetic number, because the mean of its divisors is an integer number (386438925).

Almost surely, 2^772877849 is an apocalyptic number.

It is an amenable number.

772877849 is a deficient number, since it is larger than the sum of its proper divisors (1).

772877849 is an equidigital number, since it uses as much as digits as its factorization.

772877849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11063808, while the sum is 59.

The square root of 772877849 is about 27800.6807290757. The cubic root of 772877849 is about 917.7061035200.

The spelling of 772877849 in words is "seven hundred seventy-two million, eight hundred seventy-seven thousand, eight hundred forty-nine".