8972487058921 has 3 divisors (see below), whose sum is σ = 8972490054333. Its totient is φ = 8972484063510.

The previous prime is 8972487058901. The next prime is 8972487058933. The reversal of 8972487058921 is 1298507842798.

The square root of 8972487058921 is 2995411.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 8972487058921 - 2⁵ = 8972487058889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8972487058901) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1497706 + ... + 4493116.

It is an arithmetic number, because the mean of its divisors is an integer number (2990830018111).

Almost surely, 2^{8972487058921} is an apocalyptic number.

8972487058921 is the 2995411-st square number.

8972487058921 is the 1497706-th centered octagonal number.

It is an amenable number.

8972487058921 is a deficient number, since it is larger than the sum of its proper divisors (2995412).

8972487058921 is an frugal number, since it uses more digits than its factorization.

8972487058921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5990822 (or 2995411 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 70.

The spelling of 8972487058921 in words is "eight trillion, nine hundred seventy-two billion, four hundred eighty-seven million, fifty-eight thousand, nine hundred twenty-one".