18227497 has 2 divisors, whose sum is σ = 18227498. Its totient is φ = 18227496.

The previous prime is 18227491. The next prime is 18227501. The reversal of 18227497 is 79472281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18224361 + 3136 = 4269^2 + 56^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18227497 is a prime.

It is not a weakly prime, because it can be changed into another prime (18227491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9113748 + 9113749.

It is an arithmetic number, because the mean of its divisors is an integer number (9113749).

Almost surely, 2^18227497 is an apocalyptic number.

It is an amenable number.

18227497 is a deficient number, since it is larger than the sum of its proper divisors (1).

18227497 is an equidigital number, since it uses as much as digits as its factorization.

18227497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 18227497 is about 4269.3672833337. The cubic root of 18227497 is about 263.1736144455.

The spelling of 18227497 in words is "eighteen million, two hundred twenty-seven thousand, four hundred ninety-seven".