24999997 has 4 divisors (see below), whose sum is σ = 27272736. Its totient is φ = 22727260.

The previous prime is 24999983. The next prime is 25000009. The reversal of 24999997 is 79999942.

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 24999997 - 2¹¹ = 24997949 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 (24999967) 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, 1136353 + ... + 1136374.

It is an arithmetic number, because the mean of its divisors is an integer number (6818184).

Almost surely, 2^24999997 is an apocalyptic number.

It is an amenable number.

24999997 is a deficient number, since it is larger than the sum of its proper divisors (2272739).

24999997 is a wasteful number, since it uses less digits than its factorization.

24999997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272738.

The product of its digits is 3306744, while the sum is 58.

The square root of 24999997 is about 4999.9997000000. Note that the first 3 decimals coincide. The cubic root of 24999997 is about 292.4017621252.

Subtracting 24999997 from its reverse (79999942), we obtain a palindrome (54999945).

The spelling of 24999997 in words is "twenty-four million, nine hundred ninety-nine thousand, nine hundred ninety-seven".