25138667 has 2 divisors, whose sum is σ = 25138668. Its totient is φ = 25138666.

The previous prime is 25138643. The next prime is 25138693. The reversal of 25138667 is 76683152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25138667 - 2¹⁴ = 25122283 is a prime.

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 25138667.

It is not a weakly prime, because it can be changed into another prime (25138627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12569333 + 12569334.

It is an arithmetic number, because the mean of its divisors is an integer number (12569334).

Almost surely, 2^25138667 is an apocalyptic number.

25138667 is a deficient number, since it is larger than the sum of its proper divisors (1).

25138667 is an equidigital number, since it uses as much as digits as its factorization.

25138667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 25138667 is about 5013.8475246062. The cubic root of 25138667 is about 292.9413970322.

The spelling of 25138667 in words is "twenty-five million, one hundred thirty-eight thousand, six hundred sixty-seven".