99949 has 4 divisors (see below), whose sum is σ = 100864. Its totient is φ = 99036.

The previous prime is 99929. The next prime is 99961. The reversal of 99949 is 94999.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 99949 - 2¹³ = 91757 is a prime.

It is a Duffinian number.

99949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99929) 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, 267 + ... + 520.

It is an arithmetic number, because the mean of its divisors is an integer number (25216).

2⁹⁹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

99949 is a deficient number, since it is larger than the sum of its proper divisors (915).

99949 is a wasteful number, since it uses less digits than its factorization.

99949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914.

The product of its digits is 26244, while the sum is 40.

The square root of 99949 is about 316.1471176525. The cubic root of 99949 is about 46.4079962933.

Subtracting from 99949 its reverse (94999), we obtain a triangular number (4950 = T₉₉).

The spelling of 99949 in words is "ninety-nine thousand, nine hundred forty-nine".