30979365259921 has 9 divisors (see below), whose sum is σ = 33545781561531. Its totient is φ = 28596270372072.

The previous prime is 30979365259901. The next prime is 30979365259987. The reversal of 30979365259921 is 12995256397903.

The square root of 30979365259921 is 5565911.

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., 4582746340225 + 26396618919696 = 2140735^2 + 5137764^2 .

It is not a de Polignac number, because 30979365259921 - 2¹¹ = 30979365257873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30979365259901) 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, 72142770 + ... + 72570916.

Almost surely, 2^{30979365259921} is an apocalyptic number.

30979365259921 is the 5565911-st square number.

30979365259921 is the 2782956-th centered octagonal number.

It is an amenable number.

30979365259921 is a deficient number, since it is larger than the sum of its proper divisors (2566416301610).

30979365259921 is an frugal number, since it uses more digits than its factorization.

30979365259921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856320 (or 428160 counting only the distinct ones).

The product of its (nonzero) digits is 248005800, while the sum is 70.

The spelling of 30979365259921 in words is "thirty trillion, nine hundred seventy-nine billion, three hundred sixty-five million, two hundred fifty-nine thousand, nine hundred twenty-one".