772620137 has 4 divisors (see below), whose sum is σ = 774847056. Its totient is φ = 770393220.

The previous prime is 772620119. The next prime is 772620139. The reversal of 772620137 is 731026277.

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: 731026277 = 281 ⋅2601517.

It is a cyclic number.

It is not a de Polignac number, because 772620137 - 2⁶ = 772620073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 772620097 and 772620106.

It is not an unprimeable number, because it can be changed into a prime (772620139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112939 + ... + 1113632.

It is an arithmetic number, because the mean of its divisors is an integer number (193711764).

Almost surely, 2^772620137 is an apocalyptic number.

It is an amenable number.

772620137 is a deficient number, since it is larger than the sum of its proper divisors (2226919).

772620137 is a wasteful number, since it uses less digits than its factorization.

772620137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226918.

The product of its (nonzero) digits is 24696, while the sum is 35.

The square root of 772620137 is about 27796.0453482146. The cubic root of 772620137 is about 917.6040907774.

The spelling of 772620137 in words is "seven hundred seventy-two million, six hundred twenty thousand, one hundred thirty-seven".