24991149 has 4 divisors (see below), whose sum is σ = 33321536. Its totient is φ = 16660764.

The previous prime is 24991123. The next prime is 24991157. The reversal of 24991149 is 94119942.

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.

It is not a de Polignac number, because 24991149 - 2⁵ = 24991117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24991189) 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, 4165189 + ... + 4165194.

It is an arithmetic number, because the mean of its divisors is an integer number (8330384).

Almost surely, 2^24991149 is an apocalyptic number.

It is an amenable number.

24991149 is a deficient number, since it is larger than the sum of its proper divisors (8330387).

24991149 is an equidigital number, since it uses as much as digits as its factorization.

24991149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8330386.

The product of its digits is 23328, while the sum is 39.

The square root of 24991149 is about 4999.1148216459. The cubic root of 24991149 is about 292.3672624402.

The spelling of 24991149 in words is "twenty-four million, nine hundred ninety-one thousand, one hundred forty-nine".