25267993 has 2 divisors, whose sum is σ = 25267994. Its totient is φ = 25267992.

The previous prime is 25267981. The next prime is 25267997. The reversal of 25267993 is 39976252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23396569 + 1871424 = 4837^2 + 1368^2 .

It is a cyclic number.

It is not a de Polignac number, because 25267993 - 2¹⁷ = 25136921 is a prime.

It is not a weakly prime, because it can be changed into another prime (25267997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12633996 + 12633997.

It is an arithmetic number, because the mean of its divisors is an integer number (12633997).

Almost surely, 2^25267993 is an apocalyptic number.

It is an amenable number.

25267993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25267993 is an equidigital number, since it uses as much as digits as its factorization.

25267993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 43.

The square root of 25267993 is about 5026.7278621386. The cubic root of 25267993 is about 293.4428842131.

The spelling of 25267993 in words is "twenty-five million, two hundred sixty-seven thousand, nine hundred ninety-three".