772779493 has 4 divisors (see below), whose sum is σ = 776013120. Its totient is φ = 769545868.

The previous prime is 772779487. The next prime is 772779509. The reversal of 772779493 is 394977277.

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 a de Polignac number, because none of the positive numbers 2^k-772779493 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 (772779473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1616455 + ... + 1616932.

It is an arithmetic number, because the mean of its divisors is an integer number (194003280).

Almost surely, 2^772779493 is an apocalyptic number.

It is an amenable number.

772779493 is a deficient number, since it is larger than the sum of its proper divisors (3233627).

772779493 is a wasteful number, since it uses less digits than its factorization.

772779493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233626.

The product of its digits is 4667544, while the sum is 55.

The square root of 772779493 is about 27798.9117233031. The cubic root of 772779493 is about 917.6671729478.

The spelling of 772779493 in words is "seven hundred seventy-two million, seven hundred seventy-nine thousand, four hundred ninety-three".