26913691 has 6 divisors (see below), whose sum is σ = 31307820. Its totient is φ = 23068836.

The previous prime is 26913661. The next prime is 26913697. The reversal of 26913691 is 19631962.

It is a de Polignac number, because none of the positive numbers 2^k-26913691 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 26913691.

It is not an unprimeable number, because it can be changed into a prime (26913697) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 274581 + ... + 274678.

It is an arithmetic number, because the mean of its divisors is an integer number (5217970).

Almost surely, 2^26913691 is an apocalyptic number.

26913691 is a deficient number, since it is larger than the sum of its proper divisors (4394129).

26913691 is an equidigital number, since it uses as much as digits as its factorization.

26913691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549273 (or 549266 counting only the distinct ones).

The product of its digits is 17496, while the sum is 37.

The square root of 26913691 is about 5187.8406876079. The cubic root of 26913691 is about 299.6799958161.

The spelling of 26913691 in words is "twenty-six million, nine hundred thirteen thousand, six hundred ninety-one".