180731087 has 2 divisors, whose sum is σ = 180731088. Its totient is φ = 180731086.

The previous prime is 180731069. The next prime is 180731123. The reversal of 180731087 is 780137081.

It is a weak prime.

It is an emirp because it is prime and its reverse (780137081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180731087 - 2¹² = 180726991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180731687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90365543 + 90365544.

It is an arithmetic number, because the mean of its divisors is an integer number (90365544).

Almost surely, 2^180731087 is an apocalyptic number.

180731087 is a deficient number, since it is larger than the sum of its proper divisors (1).

180731087 is an equidigital number, since it uses as much as digits as its factorization.

180731087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 180731087 is about 13443.6262593097. The cubic root of 180731087 is about 565.3850060758.

The spelling of 180731087 in words is "one hundred eighty million, seven hundred thirty-one thousand, eighty-seven".