26947661 has 4 divisors (see below), whose sum is σ = 29020572. Its totient is φ = 24874752.

The previous prime is 26947639. The next prime is 26947663. The reversal of 26947661 is 16674962.

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 13213225 + 13734436 = 3635^2 + 3706^2 .

It is a cyclic number.

It is not a de Polignac number, because 26947661 - 2⁶ = 26947597 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 (26947663) 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, 1036436 + ... + 1036461.

It is an arithmetic number, because the mean of its divisors is an integer number (7255143).

Almost surely, 2^26947661 is an apocalyptic number.

It is an amenable number.

26947661 is a deficient number, since it is larger than the sum of its proper divisors (2072911).

26947661 is a wasteful number, since it uses less digits than its factorization.

26947661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072910.

The product of its digits is 108864, while the sum is 41.

The square root of 26947661 is about 5191.1136570104. The cubic root of 26947661 is about 299.8060264598.

The spelling of 26947661 in words is "twenty-six million, nine hundred forty-seven thousand, six hundred sixty-one".