24999949 has 4 divisors (see below), whose sum is σ = 26923036. Its totient is φ = 23076864.

The previous prime is 24999929. The next prime is 24999959. The reversal of 24999949 is 94999942.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1087849 + 23912100 = 1043^2 + 4890^2 .

It is a cyclic number.

It is not a de Polignac number, because 24999949 - 2¹⁵ = 24967181 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 24999949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24999929) 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, 961524 + ... + 961549.

It is an arithmetic number, because the mean of its divisors is an integer number (6730759).

Almost surely, 2^24999949 is an apocalyptic number.

It is an amenable number.

24999949 is a deficient number, since it is larger than the sum of its proper divisors (1923087).

24999949 is a wasteful number, since it uses less digits than its factorization.

24999949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923086.

The product of its digits is 1889568, while the sum is 55.

The square root of 24999949 is about 4999.9948999974. The cubic root of 24999949 is about 292.4015749879.

The spelling of 24999949 in words is "twenty-four million, nine hundred ninety-nine thousand, nine hundred forty-nine".