777993397 has 4 divisors (see below), whose sum is σ = 794546496. Its totient is φ = 761440300.

The previous prime is 777993383. The next prime is 777993401. The reversal of 777993397 is 793399777.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 777993397 - 2¹⁵ = 777960629 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 (777993317) 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 in 3 ways as a sum of consecutive naturals, for example, 8276479 + ... + 8276572.

It is an arithmetic number, because the mean of its divisors is an integer number (198636624).

Almost surely, 2^777993397 is an apocalyptic number.

It is an amenable number.

777993397 is a deficient number, since it is larger than the sum of its proper divisors (16553099).

777993397 is a wasteful number, since it uses less digits than its factorization.

777993397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16553098.

The product of its digits is 15752961, while the sum is 61.

The square root of 777993397 is about 27892.5329972020. The cubic root of 777993397 is about 919.7263667159.

The spelling of 777993397 in words is "seven hundred seventy-seven million, nine hundred ninety-three thousand, three hundred ninety-seven".