26872991 has 2 divisors, whose sum is σ = 26872992. Its totient is φ = 26872990.

The previous prime is 26872933. The next prime is 26872997. The reversal of 26872991 is 19927862.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26872991 - 2¹⁰ = 26871967 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26872997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13436495 + 13436496.

It is an arithmetic number, because the mean of its divisors is an integer number (13436496).

Almost surely, 2^26872991 is an apocalyptic number.

26872991 is a deficient number, since it is larger than the sum of its proper divisors (1).

26872991 is an equidigital number, since it uses as much as digits as its factorization.

26872991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 26872991 is about 5183.9165695447. The cubic root of 26872991 is about 299.5288567638.

The spelling of 26872991 in words is "twenty-six million, eight hundred seventy-two thousand, nine hundred ninety-one".