25117739 has 2 divisors, whose sum is σ = 25117740. Its totient is φ = 25117738.

The previous prime is 25117733. The next prime is 25117769. The reversal of 25117739 is 93771152.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25117739 - 2⁴ = 25117723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25117699 and 25117708.

It is not a weakly prime, because it can be changed into another prime (25117733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12558869 + 12558870.

It is an arithmetic number, because the mean of its divisors is an integer number (12558870).

Almost surely, 2^25117739 is an apocalyptic number.

25117739 is a deficient number, since it is larger than the sum of its proper divisors (1).

25117739 is an equidigital number, since it uses as much as digits as its factorization.

25117739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13230, while the sum is 35.

The square root of 25117739 is about 5011.7600700752. The cubic root of 25117739 is about 292.8600829936.

The spelling of 25117739 in words is "twenty-five million, one hundred seventeen thousand, seven hundred thirty-nine".