7797667949 has 2 divisors, whose sum is σ = 7797667950. Its totient is φ = 7797667948.

The previous prime is 7797667921. The next prime is 7797667979. The reversal of 7797667949 is 9497667977.

7797667949 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5340978724 + 2456689225 = 73082^2 + 49565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7797667949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7797667909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3898833974 + 3898833975.

It is an arithmetic number, because the mean of its divisors is an integer number (3898833975).

Almost surely, 2^7797667949 is an apocalyptic number.

It is an amenable number.

7797667949 is a deficient number, since it is larger than the sum of its proper divisors (1).

7797667949 is an equidigital number, since it uses as much as digits as its factorization.

7797667949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252047376, while the sum is 71.

The square root of 7797667949 is about 88304.4050373479. The cubic root of 7797667949 is about 1982.9948174240.

The spelling of 7797667949 in words is "seven billion, seven hundred ninety-seven million, six hundred sixty-seven thousand, nine hundred forty-nine".