99400001 has 4 divisors (see below), whose sum is σ = 104631600. Its totient is φ = 94168404.

The previous prime is 99399983. The next prime is 99400009. The reversal of 99400001 is 10000499.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10000499 = 2659 ⋅3761.

It is a cyclic number.

It is not a de Polignac number, because 99400001 - 2²² = 95205697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99400001.

It is not an unprimeable number, because it can be changed into a prime (99400009) 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, 2615771 + ... + 2615808.

It is an arithmetic number, because the mean of its divisors is an integer number (26157900).

Almost surely, 2^99400001 is an apocalyptic number.

It is an amenable number.

99400001 is a deficient number, since it is larger than the sum of its proper divisors (5231599).

99400001 is a wasteful number, since it uses less digits than its factorization.

99400001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5231598.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 99400001 is about 9969.9549146423. The cubic root of 99400001 is about 463.2287042988.

The spelling of 99400001 in words is "ninety-nine million, four hundred thousand, one".