26997749 has 4 divisors (see below), whose sum is σ = 27059136. Its totient is φ = 26936364.

The previous prime is 26997713. The next prime is 26997769. The reversal of 26997749 is 94779962.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94779962 = 2 ⋅47389981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26997749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26997749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26997709) 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, 30029 + ... + 30914.

It is an arithmetic number, because the mean of its divisors is an integer number (6764784).

Almost surely, 2^26997749 is an apocalyptic number.

It is an amenable number.

26997749 is a deficient number, since it is larger than the sum of its proper divisors (61387).

26997749 is an equidigital number, since it uses as much as digits as its factorization.

26997749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61386.

The product of its digits is 1714608, while the sum is 53.

The square root of 26997749 is about 5195.9358156159. The cubic root of 26997749 is about 299.9916627313.

The spelling of 26997749 in words is "twenty-six million, nine hundred ninety-seven thousand, seven hundred forty-nine".