25489739 has 6 divisors (see below), whose sum is σ = 28017780. Its totient is φ = 23172380.

The previous prime is 25489733. The next prime is 25489813. The reversal of 25489739 is 93798452.

It is a happy number.

It is not a de Polignac number, because 25489739 - 2²⁴ = 8712523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25489693 and 25489702.

It is not an unprimeable number, because it can be changed into a prime (25489733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105209 + ... + 105450.

It is an arithmetic number, because the mean of its divisors is an integer number (4669630).

Almost surely, 2^25489739 is an apocalyptic number.

25489739 is a deficient number, since it is larger than the sum of its proper divisors (2528041).

25489739 is a wasteful number, since it uses less digits than its factorization.

25489739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210681 (or 210670 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The square root of 25489739 is about 5048.7363765600. The cubic root of 25489739 is about 294.2987807443.

The spelling of 25489739 in words is "twenty-five million, four hundred eighty-nine thousand, seven hundred thirty-nine".