7977117797 has 8 divisors (see below), whose sum is σ = 8734664160. Its totient is φ = 7224963760.

The previous prime is 7977117773. The next prime is 7977117839.

7977117797 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7977117797 - 2¹² = 7977113701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7977117737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344983 + ... + 1350900.

It is an arithmetic number, because the mean of its divisors is an integer number (1091833020).

Almost surely, 2^7977117797 is an apocalyptic number.

It is an amenable number.

7977117797 is a deficient number, since it is larger than the sum of its proper divisors (757546363).

7977117797 is a wasteful number, since it uses less digits than its factorization.

7977117797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696163.

The product of its digits is 9529569, while the sum is 62.

The square root of 7977117797 is about 89314.7120971680. The cubic root of 7977117797 is about 1998.0913288166.

It can be divided in two parts, 797711 and 7797, that added together give a palindrome (805508).

The spelling of 7977117797 in words is "seven billion, nine hundred seventy-seven million, one hundred seventeen thousand, seven hundred ninety-seven".