4992976921 has 9 divisors (see below), whose sum is σ = 5271013461. Its totient is φ = 4728916764.

The previous prime is 4992976909. The next prime is 4992976931. The reversal of 4992976921 is 1296792994.

The square root of 4992976921 is 70661.

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

It is not a de Polignac number, because 4992976921 - 2⁹ = 4992976409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4992976931) 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, 1340700 + ... + 1344418.

Almost surely, 2^4992976921 is an apocalyptic number.

4992976921 is the 70661-st square number.

4992976921 is the 35331-st centered octagonal number.

It is an amenable number.

4992976921 is a deficient number, since it is larger than the sum of its proper divisors (278036540).

4992976921 is an frugal number, since it uses more digits than its factorization.

4992976921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7476 (or 3738 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 58.

The cubic root of 4992976921 is about 1709.1749517854.

The spelling of 4992976921 in words is "four billion, nine hundred ninety-two million, nine hundred seventy-six thousand, nine hundred twenty-one".