934777651921 has 9 divisors (see below), whose sum is σ = 936893033499. Its totient is φ = 932667042384.

The previous prime is 934777651919. The next prime is 934777651937. The reversal of 934777651921 is 129156777439.

The square root of 934777651921 is 966839.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 27071766225 + 907705885696 = 164535^2 + 952736^2 .

It is not a de Polignac number, because 934777651921 - 2¹ = 934777651919 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 934777651921.

It is not an unprimeable number, because it can be changed into a prime (934777657921) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 596538880 + ... + 596540446.

Almost surely, 2^934777651921 is an apocalyptic number.

934777651921 is the 966839-th square number.

934777651921 is the 483420-th centered octagonal number.

It is an amenable number.

934777651921 is a deficient number, since it is larger than the sum of its proper divisors (2115381578).

934777651921 is an frugal number, since it uses more digits than its factorization.

934777651921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4368 (or 2184 counting only the distinct ones).

The product of its digits is 20003760, while the sum is 61.

The spelling of 934777651921 in words is "nine hundred thirty-four billion, seven hundred seventy-seven million, six hundred fifty-one thousand, nine hundred twenty-one".