99642401 has 4 divisors (see below), whose sum is σ = 102856704. Its totient is φ = 96428100.

The previous prime is 99642343. The next prime is 99642407. The reversal of 99642401 is 10424699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99642401 - 2⁶ = 99642337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99642407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1607105 + ... + 1607166.

It is an arithmetic number, because the mean of its divisors is an integer number (25714176).

Almost surely, 2^99642401 is an apocalyptic number.

It is an amenable number.

99642401 is a deficient number, since it is larger than the sum of its proper divisors (3214303).

99642401 is a wasteful number, since it uses less digits than its factorization.

99642401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3214302.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 99642401 is about 9982.1040367249. The cubic root of 99642401 is about 463.6049467032.

The spelling of 99642401 in words is "ninety-nine million, six hundred forty-two thousand, four hundred one".