180986749 has 2 divisors, whose sum is σ = 180986750. Its totient is φ = 180986748.

The previous prime is 180986717. The next prime is 180986791. The reversal of 180986749 is 947689081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176225625 + 4761124 = 13275^2 + 2182^2 .

It is an emirp because it is prime and its reverse (947689081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180986749 - 2⁵ = 180986717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 180986696 and 180986705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180986549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90493374 + 90493375.

It is an arithmetic number, because the mean of its divisors is an integer number (90493375).

Almost surely, 2^180986749 is an apocalyptic number.

It is an amenable number.

180986749 is a deficient number, since it is larger than the sum of its proper divisors (1).

180986749 is an equidigital number, since it uses as much as digits as its factorization.

180986749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 180986749 is about 13453.1315685234. The cubic root of 180986749 is about 565.6514781374.

The spelling of 180986749 in words is "one hundred eighty million, nine hundred eighty-six thousand, seven hundred forty-nine".