18089677 has 2 divisors, whose sum is σ = 18089678. Its totient is φ = 18089676.

The previous prime is 18089623. The next prime is 18089693. The reversal of 18089677 is 77698081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13883076 + 4206601 = 3726^2 + 2051^2 .

It is a cyclic number.

It is not a de Polignac number, because 18089677 - 2¹⁹ = 17565389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18080677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9044838 + 9044839.

It is an arithmetic number, because the mean of its divisors is an integer number (9044839).

Almost surely, 2^18089677 is an apocalyptic number.

It is an amenable number.

18089677 is a deficient number, since it is larger than the sum of its proper divisors (1).

18089677 is an equidigital number, since it uses as much as digits as its factorization.

18089677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 18089677 is about 4253.1960923522. The cubic root of 18089677 is about 262.5086412877.

The spelling of 18089677 in words is "eighteen million, eighty-nine thousand, six hundred seventy-seven".