25039999 has 2 divisors, whose sum is σ = 25040000. Its totient is φ = 25039998.

The previous prime is 25039961. The next prime is 25040017. The reversal of 25039999 is 99993052.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25039999 - 2¹¹ = 25037951 is a prime.

25039999 is a modest number, since divided by 9999 gives 2503 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25039799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12519999 + 12520000.

It is an arithmetic number, because the mean of its divisors is an integer number (12520000).

Almost surely, 2^25039999 is an apocalyptic number.

25039999 is a deficient number, since it is larger than the sum of its proper divisors (1).

25039999 is an equidigital number, since it uses as much as digits as its factorization.

25039999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196830, while the sum is 46.

The square root of 25039999 is about 5003.9983013586. The cubic root of 25039999 is about 292.5576344412.

The spelling of 25039999 in words is "twenty-five million, thirty-nine thousand, nine hundred ninety-nine".