772676521 has 4 divisors (see below), whose sum is σ = 772824832. Its totient is φ = 772528212.

The previous prime is 772676501. The next prime is 772676533. The reversal of 772676521 is 125676277.

772676521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125676277 = 89 ⋅1412093.

It is a cyclic number.

It is not a de Polignac number, because 772676521 - 2⁷ = 772676393 is a prime.

It is a super-2 number, since 2×772676521² = 1194058012209326882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (772676501) 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, 66045 + ... + 76858.

It is an arithmetic number, because the mean of its divisors is an integer number (193206208).

Almost surely, 2^772676521 is an apocalyptic number.

It is an amenable number.

772676521 is a deficient number, since it is larger than the sum of its proper divisors (148311).

772676521 is a wasteful number, since it uses less digits than its factorization.

772676521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148310.

The product of its digits is 246960, while the sum is 43.

The square root of 772676521 is about 27797.0595747104. The cubic root of 772676521 is about 917.6264117637.

The spelling of 772676521 in words is "seven hundred seventy-two million, six hundred seventy-six thousand, five hundred twenty-one".