25739963 has 4 divisors (see below), whose sum is σ = 25764648. Its totient is φ = 25715280.

The previous prime is 25739939. The next prime is 25739969. The reversal of 25739963 is 36993752.

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 25739963 - 2¹⁶ = 25674427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25739969) 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, 10706 + ... + 12887.

It is an arithmetic number, because the mean of its divisors is an integer number (6441162).

Almost surely, 2^25739963 is an apocalyptic number.

25739963 is a deficient number, since it is larger than the sum of its proper divisors (24685).

25739963 is a wasteful number, since it uses less digits than its factorization.

25739963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24684.

The product of its digits is 306180, while the sum is 44.

The square root of 25739963 is about 5073.4567111586. The cubic root of 25739963 is about 295.2586566057.

The spelling of 25739963 in words is "twenty-five million, seven hundred thirty-nine thousand, nine hundred sixty-three".