772152391 has 4 divisors (see below), whose sum is σ = 778985712. Its totient is φ = 765319072.

The previous prime is 772152349. The next prime is 772152431. The reversal of 772152391 is 193251277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193251277 = 673 ⋅287149.

It is a cyclic number.

It is not a de Polignac number, because 772152391 - 2¹¹ = 772150343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 772152391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172152391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3416491 + ... + 3416716.

It is an arithmetic number, because the mean of its divisors is an integer number (194746428).

Almost surely, 2^772152391 is an apocalyptic number.

772152391 is a deficient number, since it is larger than the sum of its proper divisors (6833321).

772152391 is a wasteful number, since it uses less digits than its factorization.

772152391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6833320.

The product of its digits is 26460, while the sum is 37.

The square root of 772152391 is about 27787.6301796321. The cubic root of 772152391 is about 917.4188801908.

The spelling of 772152391 in words is "seven hundred seventy-two million, one hundred fifty-two thousand, three hundred ninety-one".