25291723 has 2 divisors, whose sum is σ = 25291724. Its totient is φ = 25291722.

The previous prime is 25291709. The next prime is 25291729. The reversal of 25291723 is 32719252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25291723 is a prime.

It is not a weakly prime, because it can be changed into another prime (25291729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12645861 + 12645862.

It is an arithmetic number, because the mean of its divisors is an integer number (12645862).

Almost surely, 2^25291723 is an apocalyptic number.

25291723 is a deficient number, since it is larger than the sum of its proper divisors (1).

25291723 is an equidigital number, since it uses as much as digits as its factorization.

25291723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 31.

The square root of 25291723 is about 5029.0876906254. The cubic root of 25291723 is about 293.5347160802.

The spelling of 25291723 in words is "twenty-five million, two hundred ninety-one thousand, seven hundred twenty-three".