97941721 has 8 divisors (see below), whose sum is σ = 99937800. Its totient is φ = 95951232.

The previous prime is 97941719. The next prime is 97941737. The reversal of 97941721 is 12714979.

97941721 = T₈₀₇₉ + T₈₀₈₀ + T₈₀₈₁.

It can be written as a sum of positive squares in 4 ways, for example, as 17139600 + 80802121 = 4140^2 + 8989^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97941721 - 2¹ = 97941719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97941761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62455 + ... + 64003.

It is an arithmetic number, because the mean of its divisors is an integer number (12492225).

Almost surely, 2^97941721 is an apocalyptic number.

97941721 is the 8081-st centered triangular number.

It is an amenable number.

97941721 is a deficient number, since it is larger than the sum of its proper divisors (1996079).

97941721 is a wasteful number, since it uses less digits than its factorization.

97941721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795.

The product of its digits is 31752, while the sum is 40.

The square root of 97941721 is about 9896.5509648564. The cubic root of 97941721 is about 460.9522193771.

The spelling of 97941721 in words is "ninety-seven million, nine hundred forty-one thousand, seven hundred twenty-one".