99143939 has 8 divisors (see below), whose sum is σ = 101610432. Its totient is φ = 96684840.

The previous prime is 99143927. The next prime is 99143959. The reversal of 99143939 is 93934199.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99143939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99143893 and 99143902.

It is not an unprimeable number, because it can be changed into a prime (99143909) 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, 33452 + ... + 36294.

It is an arithmetic number, because the mean of its divisors is an integer number (12701304).

Almost surely, 2^99143939 is an apocalyptic number.

99143939 is a deficient number, since it is larger than the sum of its proper divisors (2466493).

99143939 is a wasteful number, since it uses less digits than its factorization.

99143939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697.

The product of its digits is 236196, while the sum is 47.

The square root of 99143939 is about 9957.1049507374. The cubic root of 99143939 is about 462.8305913970.

The spelling of 99143939 in words is "ninety-nine million, one hundred forty-three thousand, nine hundred thirty-nine".