771630949 has 2 divisors, whose sum is σ = 771630950. Its totient is φ = 771630948.

The previous prime is 771630941. The next prime is 771630961. The reversal of 771630949 is 949036177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 686806849 + 84824100 = 26207^2 + 9210^2 .

It is a cyclic number.

It is not a de Polignac number, because 771630949 - 2³ = 771630941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 771630899 and 771630908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (771630941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385815474 + 385815475.

It is an arithmetic number, because the mean of its divisors is an integer number (385815475).

Almost surely, 2^771630949 is an apocalyptic number.

It is an amenable number.

771630949 is a deficient number, since it is larger than the sum of its proper divisors (1).

771630949 is an equidigital number, since it uses as much as digits as its factorization.

771630949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 771630949 is about 27778.2459669433. The cubic root of 771630949 is about 917.2123197300.

The spelling of 771630949 in words is "seven hundred seventy-one million, six hundred thirty thousand, nine hundred forty-nine".