25499023 has 4 divisors (see below), whose sum is σ = 27817128. Its totient is φ = 23180920.

The previous prime is 25499021. The next prime is 25499027. The reversal of 25499023 is 32099452.

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

It is a cyclic number.

It is not a de Polignac number, because 25499023 - 2¹ = 25499021 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 25499023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25499021) 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, 1159036 + ... + 1159057.

It is an arithmetic number, because the mean of its divisors is an integer number (6954282).

Almost surely, 2^25499023 is an apocalyptic number.

25499023 is a deficient number, since it is larger than the sum of its proper divisors (2318105).

25499023 is a wasteful number, since it uses less digits than its factorization.

25499023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318104.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 25499023 is about 5049.6557308395. The cubic root of 25499023 is about 294.3345067310.

It can be divided in two parts, 2 and 5499023, that added together give a square (5499025 = 2345²).

The spelling of 25499023 in words is "twenty-five million, four hundred ninety-nine thousand, twenty-three".