25391479 has 2 divisors, whose sum is σ = 25391480. Its totient is φ = 25391478.

The previous prime is 25391477. The next prime is 25391533. The reversal of 25391479 is 97419352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25391479 - 2¹ = 25391477 is a prime.

Together with 25391477, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1588819 and since 25391479 and 1588819 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25391473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12695739 + 12695740.

It is an arithmetic number, because the mean of its divisors is an integer number (12695740).

Almost surely, 2^25391479 is an apocalyptic number.

25391479 is a deficient number, since it is larger than the sum of its proper divisors (1).

25391479 is an equidigital number, since it uses as much as digits as its factorization.

25391479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 25391479 is about 5038.9958325047. The cubic root of 25391479 is about 293.9201311730.

The spelling of 25391479 in words is "twenty-five million, three hundred ninety-one thousand, four hundred seventy-nine".