772423689 has 4 divisors (see below), whose sum is σ = 1029898256. Its totient is φ = 514949124.

The previous prime is 772423669. The next prime is 772423727. The reversal of 772423689 is 986324277.

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 not a de Polignac number, because 772423689 - 2⁹ = 772423177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (772423669) 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, 128737279 + ... + 128737284.

It is an arithmetic number, because the mean of its divisors is an integer number (257474564).

Almost surely, 2^772423689 is an apocalyptic number.

It is an amenable number.

772423689 is a deficient number, since it is larger than the sum of its proper divisors (257474567).

772423689 is a wasteful number, since it uses less digits than its factorization.

772423689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257474566.

The product of its digits is 1016064, while the sum is 48.

The square root of 772423689 is about 27792.5113834644. The cubic root of 772423689 is about 917.5263135447.

It can be divided in two parts, 7724 and 23689, that added together give a palindrome (31413).

The spelling of 772423689 in words is "seven hundred seventy-two million, four hundred twenty-three thousand, six hundred eighty-nine".