8337698721 has 27 divisors (see below), whose sum is σ = 13242509553. Its totient is φ = 5051324520.

The previous prime is 8337698711. The next prime is 8337698779. The reversal of 8337698721 is 1278967338.

The square root of 8337698721 is 91311.

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

It is a de Polignac number, because none of the positive numbers 2^k-8337698721 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8337698701) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3011880 + ... + 3014646.

Almost surely, 2^8337698721 is an apocalyptic number.

8337698721 is the 91311-st square number.

8337698721 is the 45656-th centered octagonal number.

It is an amenable number.

8337698721 is a deficient number, since it is larger than the sum of its proper divisors (4904810832).

8337698721 is an equidigital number, since it uses as much as digits as its factorization.

8337698721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562 (or 2781 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The cubic root of 8337698721 is about 2027.7546189869.

The spelling of 8337698721 in words is "eight billion, three hundred thirty-seven million, six hundred ninety-eight thousand, seven hundred twenty-one".