25138693 has 2 divisors, whose sum is σ = 25138694. Its totient is φ = 25138692.

The previous prime is 25138667. The next prime is 25138723. The reversal of 25138693 is 39683152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25070049 + 68644 = 5007^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 25138693 - 2⁹ = 25138181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25138643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12569346 + 12569347.

It is an arithmetic number, because the mean of its divisors is an integer number (12569347).

Almost surely, 2^25138693 is an apocalyptic number.

It is an amenable number.

25138693 is a deficient number, since it is larger than the sum of its proper divisors (1).

25138693 is an equidigital number, since it uses as much as digits as its factorization.

25138693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 25138693 is about 5013.8501174247. The cubic root of 25138693 is about 292.9414980250.

The spelling of 25138693 in words is "twenty-five million, one hundred thirty-eight thousand, six hundred ninety-three".