7940499977 has 2 divisors, whose sum is σ = 7940499978. Its totient is φ = 7940499976.

The previous prime is 7940499953. The next prime is 7940500019. The reversal of 7940499977 is 7799940497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5834057161 + 2106442816 = 76381^2 + 45896^2 .

It is a cyclic number.

It is not a de Polignac number, because 7940499977 - 2¹⁰ = 7940498953 is a prime.

It is not a weakly prime, because it can be changed into another prime (7940499937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3970249988 + 3970249989.

It is an arithmetic number, because the mean of its divisors is an integer number (3970249989).

Almost surely, 2^7940499977 is an apocalyptic number.

It is an amenable number.

7940499977 is a deficient number, since it is larger than the sum of its proper divisors (1).

7940499977 is an equidigital number, since it uses as much as digits as its factorization.

7940499977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36006768, while the sum is 65.

The square root of 7940499977 is about 89109.4830924296. The cubic root of 7940499977 is about 1995.0293211604.

The spelling of 7940499977 in words is "seven billion, nine hundred forty million, four hundred ninety-nine thousand, nine hundred seventy-seven".