4947574921 has 9 divisors (see below), whose sum is σ = 5114576583. Its totient is φ = 4785865560.

The previous prime is 4947574909. The next prime is 4947574943. The reversal of 4947574921 is 1294757494.

It is a happy number.

The square root of 4947574921 is 70339.

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., 211382521 + 4736192400 = 14539^2 + 68820^2 .

It is not a de Polignac number, because 4947574921 - 2¹¹ = 4947572873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4947572921) 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, 2179375 + ... + 2181643.

It is an arithmetic number, because the mean of its divisors is an integer number (568286287).

Almost surely, 2^4947574921 is an apocalyptic number.

4947574921 is the 70339-th square number.

4947574921 is the 35170-th centered octagonal number.

It is an amenable number.

4947574921 is a deficient number, since it is larger than the sum of its proper divisors (167001662).

4947574921 is an frugal number, since it uses more digits than its factorization.

4947574921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600 (or 2300 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 52.

The cubic root of 4947574921 is about 1703.9785617486.

The spelling of 4947574921 in words is "four billion, nine hundred forty-seven million, five hundred seventy-four thousand, nine hundred twenty-one".