18000769 has 2 divisors, whose sum is σ = 18000770. Its totient is φ = 18000768.

The previous prime is 18000767. The next prime is 18000779. The reversal of 18000769 is 96700081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14440000 + 3560769 = 3800^2 + 1887^2 .

It is an emirp because it is prime and its reverse (96700081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18000769 - 2¹ = 18000767 is a prime.

It is a super-2 number, since 2×18000769² = 648055369182722, which contains 22 as substring.

Together with 18000767, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18000769.

It is not a weakly prime, because it can be changed into another prime (18000767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9000384 + 9000385.

It is an arithmetic number, because the mean of its divisors is an integer number (9000385).

Almost surely, 2^18000769 is an apocalyptic number.

It is an amenable number.

18000769 is a deficient number, since it is larger than the sum of its proper divisors (1).

18000769 is an equidigital number, since it uses as much as digits as its factorization.

18000769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 18000769 is about 4242.7313136705. The cubic root of 18000769 is about 262.0778714976.

It can be divided in two parts, 18000 and 769, that added together give a square (18769 = 137²).

The spelling of 18000769 in words is "eighteen million, seven hundred sixty-nine", and thus it is an aban number.