25079639 has 8 divisors (see below), whose sum is σ = 28430640. Its totient is φ = 21931776.

The previous prime is 25079629. The next prime is 25079647. The reversal of 25079639 is 93697052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25079639 - 2¹⁶ = 25014103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25079596 and 25079605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25079609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50522 + ... + 51015.

It is an arithmetic number, because the mean of its divisors is an integer number (3553830).

Almost surely, 2^25079639 is an apocalyptic number.

25079639 is a deficient number, since it is larger than the sum of its proper divisors (3351001).

25079639 is a wasteful number, since it uses less digits than its factorization.

25079639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101569.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 25079639 is about 5007.9575677116. The cubic root of 25079639 is about 292.7119325092.

The spelling of 25079639 in words is "twenty-five million, seventy-nine thousand, six hundred thirty-nine".