26997965 has 4 divisors (see below), whose sum is σ = 32397564. Its totient is φ = 21598368.

The previous prime is 26997959. The next prime is 26997973. The reversal of 26997965 is 56979962.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3678724 + 23319241 = 1918^2 + 4829^2 .

It is a cyclic number.

It is not a de Polignac number, because 26997965 - 2⁸ = 26997709 is a prime.

It is a super-2 number, since 2×26997965² = 1457780228282450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2699792 + ... + 2699801.

It is an arithmetic number, because the mean of its divisors is an integer number (8099391).

Almost surely, 2^26997965 is an apocalyptic number.

It is an amenable number.

26997965 is a deficient number, since it is larger than the sum of its proper divisors (5399599).

26997965 is an equidigital number, since it uses as much as digits as its factorization.

26997965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5399598.

The product of its digits is 1837080, while the sum is 53.

The square root of 26997965 is about 5195.9566010505. The cubic root of 26997965 is about 299.9924627736.

The spelling of 26997965 in words is "twenty-six million, nine hundred ninety-seven thousand, nine hundred sixty-five".