99724601 has 8 divisors (see below), whose sum is σ = 105956424. Its totient is φ = 93533440.

The previous prime is 99724561. The next prime is 99724627. The reversal of 99724601 is 10642799.

It can be written as a sum of positive squares in 4 ways, for example, as 25351225 + 74373376 = 5035^2 + 8624^2 .

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 99724601 - 2¹⁰ = 99723577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99724661) 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, 5030 + ... + 14991.

It is an arithmetic number, because the mean of its divisors is an integer number (13244553).

Almost surely, 2^99724601 is an apocalyptic number.

It is an amenable number.

99724601 is a deficient number, since it is larger than the sum of its proper divisors (6231823).

99724601 is a wasteful number, since it uses less digits than its factorization.

99724601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20331.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 99724601 is about 9986.2205563466. The cubic root of 99724601 is about 463.7323952990.

The spelling of 99724601 in words is "ninety-nine million, seven hundred twenty-four thousand, six hundred one".