25049949 has 4 divisors (see below), whose sum is σ = 33399936. Its totient is φ = 16699964.

The previous prime is 25049933. The next prime is 25049957. The reversal of 25049949 is 94994052.

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 a cyclic number.

It is not a de Polignac number, because 25049949 - 2⁴ = 25049933 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25049949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25849949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4174989 + ... + 4174994.

It is an arithmetic number, because the mean of its divisors is an integer number (8349984).

Almost surely, 2^25049949 is an apocalyptic number.

It is an amenable number.

25049949 is a deficient number, since it is larger than the sum of its proper divisors (8349987).

25049949 is an equidigital number, since it uses as much as digits as its factorization.

25049949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8349986.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 25049949 is about 5004.9924075866. The cubic root of 25049949 is about 292.5963799564.

The spelling of 25049949 in words is "twenty-five million, forty-nine thousand, nine hundred forty-nine".