25704691 has 2 divisors, whose sum is σ = 25704692. Its totient is φ = 25704690.

The previous prime is 25704671. The next prime is 25704727. The reversal of 25704691 is 19640752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25704691 - 2¹⁷ = 25573619 is a prime.

It is a super-2 number, since 2×25704691² = 1321462278810962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25704641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12852345 + 12852346.

It is an arithmetic number, because the mean of its divisors is an integer number (12852346).

Almost surely, 2^25704691 is an apocalyptic number.

25704691 is a deficient number, since it is larger than the sum of its proper divisors (1).

25704691 is an equidigital number, since it uses as much as digits as its factorization.

25704691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 25704691 is about 5069.9793885183. The cubic root of 25704691 is about 295.1237286214.

The spelling of 25704691 in words is "twenty-five million, seven hundred four thousand, six hundred ninety-one".