9487021621 has 32 divisors (see below), whose sum is σ = 11956108032. Its totient is φ = 7312796160.

The previous prime is 9487021603. The next prime is 9487021627. The reversal of 9487021621 is 1261207849.

It is a cyclic number.

It is not a de Polignac number, because 9487021621 - 2⁷ = 9487021493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9487021627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3342615 + ... + 3345451.

It is an arithmetic number, because the mean of its divisors is an integer number (373628376).

Almost surely, 2^9487021621 is an apocalyptic number.

It is an amenable number.

9487021621 is a deficient number, since it is larger than the sum of its proper divisors (2469086411).

9487021621 is a wasteful number, since it uses less digits than its factorization.

9487021621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 9487021621 is about 97401.3430143548. The cubic root of 9487021621 is about 2116.9468942839.

The spelling of 9487021621 in words is "nine billion, four hundred eighty-seven million, twenty-one thousand, six hundred twenty-one".