25137947 has 2 divisors, whose sum is σ = 25137948. Its totient is φ = 25137946.

The previous prime is 25137943. The next prime is 25137949. The reversal of 25137947 is 74973152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25137947 - 2² = 25137943 is a prime.

Together with 25137949, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25137947.

It is not a weakly prime, because it can be changed into another prime (25137943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12568973 + 12568974.

It is an arithmetic number, because the mean of its divisors is an integer number (12568974).

Almost surely, 2^25137947 is an apocalyptic number.

25137947 is a deficient number, since it is larger than the sum of its proper divisors (1).

25137947 is an equidigital number, since it uses as much as digits as its factorization.

25137947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 38.

The square root of 25137947 is about 5013.7757229457. The cubic root of 25137947 is about 292.9386002806.

The spelling of 25137947 in words is "twenty-five million, one hundred thirty-seven thousand, nine hundred forty-seven".