26312987 has 2 divisors, whose sum is σ = 26312988. Its totient is φ = 26312986.

The previous prime is 26312983. The next prime is 26313019. The reversal of 26312987 is 78921362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26312987 - 2² = 26312983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26312987.

It is not a weakly prime, because it can be changed into another prime (26312983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13156493 + 13156494.

It is an arithmetic number, because the mean of its divisors is an integer number (13156494).

Almost surely, 2^26312987 is an apocalyptic number.

26312987 is a deficient number, since it is larger than the sum of its proper divisors (1).

26312987 is an equidigital number, since it uses as much as digits as its factorization.

26312987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 26312987 is about 5129.6186018066. The cubic root of 26312987 is about 297.4336155814.

The spelling of 26312987 in words is "twenty-six million, three hundred twelve thousand, nine hundred eighty-seven".