25709479 has 2 divisors, whose sum is σ = 25709480. Its totient is φ = 25709478.

The previous prime is 25709473. The next prime is 25709531. The reversal of 25709479 is 97490752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25709479 - 2³ = 25709471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25709471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12854739 + 12854740.

It is an arithmetic number, because the mean of its divisors is an integer number (12854740).

Almost surely, 2^25709479 is an apocalyptic number.

25709479 is a deficient number, since it is larger than the sum of its proper divisors (1).

25709479 is an equidigital number, since it uses as much as digits as its factorization.

25709479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 25709479 is about 5070.4515578004. The cubic root of 25709479 is about 295.1420516672.

The spelling of 25709479 in words is "twenty-five million, seven hundred nine thousand, four hundred seventy-nine".