39998499 has 4 divisors (see below), whose sum is σ = 53331336. Its totient is φ = 26665664.

The previous prime is 39998479. The next prime is 39998503. The reversal of 39998499 is 99489993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39998499 - 2⁸ = 39998243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39998479) 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, 6666414 + ... + 6666419.

It is an arithmetic number, because the mean of its divisors is an integer number (13332834).

Almost surely, 2^39998499 is an apocalyptic number.

39998499 is a deficient number, since it is larger than the sum of its proper divisors (13332837).

39998499 is a wasteful number, since it uses less digits than its factorization.

39998499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13332836.

The product of its digits is 5668704, while the sum is 60.

The square root of 39998499 is about 6324.4366547543. The cubic root of 39998499 is about 341.9909114920.

The spelling of 39998499 in words is "thirty-nine million, nine hundred ninety-eight thousand, four hundred ninety-nine".