772089891 has 4 divisors (see below), whose sum is σ = 1029453192. Its totient is φ = 514726592.

The previous prime is 772089887. The next prime is 772089893. The reversal of 772089891 is 198980277.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 772089891 - 2² = 772089887 is a prime.

It is a super-2 number, since 2×772089891² = 1192245599568783762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (772089893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128681646 + ... + 128681651.

It is an arithmetic number, because the mean of its divisors is an integer number (257363298).

Almost surely, 2^772089891 is an apocalyptic number.

772089891 is a deficient number, since it is larger than the sum of its proper divisors (257363301).

772089891 is a wasteful number, since it uses less digits than its factorization.

772089891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257363300.

The product of its (nonzero) digits is 508032, while the sum is 51.

The square root of 772089891 is about 27786.5055557549. The cubic root of 772089891 is about 917.3941267752.

The spelling of 772089891 in words is "seven hundred seventy-two million, eighty-nine thousand, eight hundred ninety-one".