770131021 has 16 divisors (see below), whose sum is σ = 855525888. Its totient is φ = 687406000.

The previous prime is 770131007. The next prime is 770131027. The reversal of 770131021 is 120131077.

It is not a de Polignac number, because 770131021 - 2¹⁷ = 769999949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 770130983 and 770131001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770131027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149946 + ... + 154996.

It is an arithmetic number, because the mean of its divisors is an integer number (53470368).

Almost surely, 2^770131021 is an apocalyptic number.

It is an amenable number.

770131021 is a deficient number, since it is larger than the sum of its proper divisors (85394867).

770131021 is a wasteful number, since it uses less digits than its factorization.

770131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5312.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 770131021 is about 27751.2345851495. The cubic root of 770131021 is about 916.6176292152.

Adding to 770131021 its reverse (120131077), we get a palindrome (890262098).

The spelling of 770131021 in words is "seven hundred seventy million, one hundred thirty-one thousand, twenty-one".