26249491 has 2 divisors, whose sum is σ = 26249492. Its totient is φ = 26249490.

The previous prime is 26249477. The next prime is 26249501. The reversal of 26249491 is 19494262.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26249491 - 2²³ = 17860883 is a prime.

It is a super-3 number, since 3×26249491³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26249491.

It is not a weakly prime, because it can be changed into another prime (26249401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13124745 + 13124746.

It is an arithmetic number, because the mean of its divisors is an integer number (13124746).

Almost surely, 2^26249491 is an apocalyptic number.

26249491 is a deficient number, since it is larger than the sum of its proper divisors (1).

26249491 is an equidigital number, since it uses as much as digits as its factorization.

26249491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 26249491 is about 5123.4257094253. The cubic root of 26249491 is about 297.1941767011.

The spelling of 26249491 in words is "twenty-six million, two hundred forty-nine thousand, four hundred ninety-one".