99904393 has 4 divisors (see below), whose sum is σ = 105781140. Its totient is φ = 94027648.

The previous prime is 99904367. The next prime is 99904411. The reversal of 99904393 is 39340999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39340999 = 53 ⋅742283.

It can be written as a sum of positive squares in 2 ways, for example, as 66634569 + 33269824 = 8163^2 + 5768^2 .

It is a cyclic number.

It is not a de Polignac number, because 99904393 - 2¹³ = 99896201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99904193) 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, 2938348 + ... + 2938381.

It is an arithmetic number, because the mean of its divisors is an integer number (26445285).

Almost surely, 2^99904393 is an apocalyptic number.

It is an amenable number.

99904393 is a deficient number, since it is larger than the sum of its proper divisors (5876747).

99904393 is a wasteful number, since it uses less digits than its factorization.

99904393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5876746.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 99904393 is about 9995.2185068662. The cubic root of 99904393 is about 464.0109134002.

The spelling of 99904393 in words is "ninety-nine million, nine hundred four thousand, three hundred ninety-three".