99939351 has 4 divisors (see below), whose sum is σ = 133252472. Its totient is φ = 66626232.

The previous prime is 99939349. The next prime is 99939383. The reversal of 99939351 is 15393999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15393999 = 3 ⋅5131333.

It is not a de Polignac number, because 99939351 - 2¹ = 99939349 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 99939351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99939341) 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, 16656556 + ... + 16656561.

It is an arithmetic number, because the mean of its divisors is an integer number (33313118).

Almost surely, 2^99939351 is an apocalyptic number.

99939351 is a deficient number, since it is larger than the sum of its proper divisors (33313121).

99939351 is a wasteful number, since it uses less digits than its factorization.

99939351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33313120.

The product of its digits is 295245, while the sum is 48.

The square root of 99939351 is about 9996.9670900729. The cubic root of 99939351 is about 464.0650284776.

The spelling of 99939351 in words is "ninety-nine million, nine hundred thirty-nine thousand, three hundred fifty-one".