26247397 has 4 divisors (see below), whose sum is σ = 28633536. Its totient is φ = 23861260.

The previous prime is 26247391. The next prime is 26247409. The reversal of 26247397 is 79374262.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26247397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26247391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193053 + ... + 1193074.

It is an arithmetic number, because the mean of its divisors is an integer number (7158384).

Almost surely, 2^26247397 is an apocalyptic number.

It is an amenable number.

26247397 is a deficient number, since it is larger than the sum of its proper divisors (2386139).

26247397 is a wasteful number, since it uses less digits than its factorization.

26247397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386138.

The product of its digits is 127008, while the sum is 40.

The square root of 26247397 is about 5123.2213498931. The cubic root of 26247397 is about 297.1862738031.

The spelling of 26247397 in words is "twenty-six million, two hundred forty-seven thousand, three hundred ninety-seven".