97007721 has 16 divisors (see below), whose sum is σ = 135236736. Its totient is φ = 61736576.

The previous prime is 97007719. The next prime is 97007723. The reversal of 97007721 is 12770079.

It is an interprime number because it is at equal distance from previous prime (97007719) and next prime (97007723).

It is a cyclic number.

It is not a de Polignac number, because 97007721 - 2¹ = 97007719 is a prime.

It is a super-2 number, since 2×97007721² = 18820995867227682, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (97007723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43981 + ... + 46133.

It is an arithmetic number, because the mean of its divisors is an integer number (8452296).

Almost surely, 2^97007721 is an apocalyptic number.

It is an amenable number.

97007721 is a deficient number, since it is larger than the sum of its proper divisors (38229015).

97007721 is a wasteful number, since it uses less digits than its factorization.

97007721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832.

The product of its (nonzero) digits is 6174, while the sum is 33.

The square root of 97007721 is about 9849.2497683834. The cubic root of 97007721 is about 459.4822798545.

The spelling of 97007721 in words is "ninety-seven million, seven thousand, seven hundred twenty-one".