26387947 has 2 divisors, whose sum is σ = 26387948. Its totient is φ = 26387946.

The previous prime is 26387897. The next prime is 26387957. The reversal of 26387947 is 74978362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26387947 - 2⁷ = 26387819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26387897 and 26387906.

It is not a weakly prime, because it can be changed into another prime (26387957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13193973 + 13193974.

It is an arithmetic number, because the mean of its divisors is an integer number (13193974).

Almost surely, 2^26387947 is an apocalyptic number.

26387947 is a deficient number, since it is larger than the sum of its proper divisors (1).

26387947 is an equidigital number, since it uses as much as digits as its factorization.

26387947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 26387947 is about 5136.9199915903. The cubic root of 26387947 is about 297.7157891137.

It can be divided in two parts, 2638 and 7947, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 26387947 in words is "twenty-six million, three hundred eighty-seven thousand, nine hundred forty-seven".