25400047 has 2 divisors, whose sum is σ = 25400048. Its totient is φ = 25400046.

The previous prime is 25400021. The next prime is 25400051. The reversal of 25400047 is 74000452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25400047 - 2²³ = 17011439 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25400147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12700023 + 12700024.

It is an arithmetic number, because the mean of its divisors is an integer number (12700024).

Almost surely, 2^25400047 is an apocalyptic number.

25400047 is a deficient number, since it is larger than the sum of its proper divisors (1).

25400047 is an equidigital number, since it uses as much as digits as its factorization.

25400047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 25400047 is about 5039.8459301848. The cubic root of 25400047 is about 293.9531872031.

Adding to 25400047 its reverse (74000452), we get a palindrome (99400499).

The spelling of 25400047 in words is "twenty-five million, four hundred thousand, forty-seven".