25928731 has 2 divisors, whose sum is σ = 25928732. Its totient is φ = 25928730.

The previous prime is 25928719. The next prime is 25928737. The reversal of 25928731 is 13782952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25928731 - 2⁹ = 25928219 is a prime.

It is a super-2 number, since 2×25928731² = 1344598182540722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25928737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12964365 + 12964366.

It is an arithmetic number, because the mean of its divisors is an integer number (12964366).

Almost surely, 2^25928731 is an apocalyptic number.

25928731 is a deficient number, since it is larger than the sum of its proper divisors (1).

25928731 is an equidigital number, since it uses as much as digits as its factorization.

25928731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 25928731 is about 5092.0262175287. The cubic root of 25928731 is about 295.9786743523.

The spelling of 25928731 in words is "twenty-five million, nine hundred twenty-eight thousand, seven hundred thirty-one".