26139997 has 8 divisors (see below), whose sum is σ = 28191744. Its totient is φ = 24094128.

The previous prime is 26139989. The next prime is 26140007. The reversal of 26139997 is 79993162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26139997 - 2³ = 26139989 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 (26139977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13428 + ... + 15250.

It is an arithmetic number, because the mean of its divisors is an integer number (3523968).

Almost surely, 2^26139997 is an apocalyptic number.

It is an amenable number.

26139997 is a deficient number, since it is larger than the sum of its proper divisors (2051747).

26139997 is a wasteful number, since it uses less digits than its factorization.

26139997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2939.

The product of its digits is 183708, while the sum is 46.

The square root of 26139997 is about 5112.7289190803. The cubic root of 26139997 is about 296.7803740083.

The spelling of 26139997 in words is "twenty-six million, one hundred thirty-nine thousand, nine hundred ninety-seven".