25764493 has 2 divisors, whose sum is σ = 25764494. Its totient is φ = 25764492.

The previous prime is 25764457. The next prime is 25764527. The reversal of 25764493 is 39446752.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23444964 + 2319529 = 4842^2 + 1523^2 .

It is a cyclic number.

It is not a de Polignac number, because 25764493 - 2¹³ = 25756301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25764433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12882246 + 12882247.

It is an arithmetic number, because the mean of its divisors is an integer number (12882247).

Almost surely, 2^25764493 is an apocalyptic number.

It is an amenable number.

25764493 is a deficient number, since it is larger than the sum of its proper divisors (1).

25764493 is an equidigital number, since it uses as much as digits as its factorization.

25764493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The square root of 25764493 is about 5075.8736193881. The cubic root of 25764493 is about 295.3524199536.

The spelling of 25764493 in words is "twenty-five million, seven hundred sixty-four thousand, four hundred ninety-three".