26999397 has 6 divisors (see below), whose sum is σ = 38999142. Its totient is φ = 17999592.

The previous prime is 26999389. The next prime is 26999407. The reversal of 26999397 is 79399962.

It can be written as a sum of positive squares in only one way, i.e., 20061441 + 6937956 = 4479^2 + 2634^2 .

It is not a de Polignac number, because 26999397 - 2³ = 26999389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26999327) 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, 1499958 + ... + 1499975.

It is an arithmetic number, because the mean of its divisors is an integer number (6499857).

Almost surely, 2^26999397 is an apocalyptic number.

It is an amenable number.

26999397 is a deficient number, since it is larger than the sum of its proper divisors (11999745).

26999397 is a wasteful number, since it uses less digits than its factorization.

26999397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999939 (or 2999936 counting only the distinct ones).

The product of its digits is 1653372, while the sum is 54.

The square root of 26999397 is about 5196.0943986806. The cubic root of 26999397 is about 299.9977666500.

The spelling of 26999397 in words is "twenty-six million, nine hundred ninety-nine thousand, three hundred ninety-seven".