26257493 has 2 divisors, whose sum is σ = 26257494. Its totient is φ = 26257492.

The previous prime is 26257459. The next prime is 26257523. The reversal of 26257493 is 39475262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19298449 + 6959044 = 4393^2 + 2638^2 .

It is a cyclic number.

It is not a de Polignac number, because 26257493 - 2¹² = 26253397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26257423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13128746 + 13128747.

It is an arithmetic number, because the mean of its divisors is an integer number (13128747).

Almost surely, 2^26257493 is an apocalyptic number.

It is an amenable number.

26257493 is a deficient number, since it is larger than the sum of its proper divisors (1).

26257493 is an equidigital number, since it uses as much as digits as its factorization.

26257493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 26257493 is about 5124.2065727291. The cubic root of 26257493 is about 297.2243729208.

The spelling of 26257493 in words is "twenty-six million, two hundred fifty-seven thousand, four hundred ninety-three".