18077849 has 2 divisors, whose sum is σ = 18077850. Its totient is φ = 18077848.

The previous prime is 18077821. The next prime is 18077861. The reversal of 18077849 is 94877081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13801225 + 4276624 = 3715^2 + 2068^2 .

It is a cyclic number.

It is not a de Polignac number, because 18077849 - 2⁸ = 18077593 is a prime.

It is not a weakly prime, because it can be changed into another prime (18077819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9038924 + 9038925.

It is an arithmetic number, because the mean of its divisors is an integer number (9038925).

Almost surely, 2^18077849 is an apocalyptic number.

It is an amenable number.

18077849 is a deficient number, since it is larger than the sum of its proper divisors (1).

18077849 is an equidigital number, since it uses as much as digits as its factorization.

18077849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 18077849 is about 4251.8053812469. The cubic root of 18077849 is about 262.4514147420.

The spelling of 18077849 in words is "eighteen million, seventy-seven thousand, eight hundred forty-nine".