18289207 has 2 divisors, whose sum is σ = 18289208. Its totient is φ = 18289206.

The previous prime is 18289199. The next prime is 18289213. The reversal of 18289207 is 70298281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18289207 - 2³ = 18289199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18289217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9144603 + 9144604.

It is an arithmetic number, because the mean of its divisors is an integer number (9144604).

Almost surely, 2^18289207 is an apocalyptic number.

18289207 is a deficient number, since it is larger than the sum of its proper divisors (1).

18289207 is an equidigital number, since it uses as much as digits as its factorization.

18289207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 18289207 is about 4276.5882429806. The cubic root of 18289207 is about 263.4702752279.

It can be divided in two parts, 18289 and 207, that added together give a square (18496 = 136²).

The spelling of 18289207 in words is "eighteen million, two hundred eighty-nine thousand, two hundred seven".