187990442999 has 2 divisors, whose sum is σ = 187990443000. Its totient is φ = 187990442998.

The previous prime is 187990442977. The next prime is 187990443031. The reversal of 187990442999 is 999244099781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 187990442999 - 2⁸ = 187990442743 is a prime.

It is a super-2 number, since 2×187990442999² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187990442909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93995221499 + 93995221500.

It is an arithmetic number, because the mean of its divisors is an integer number (93995221500).

Almost surely, 2^187990442999 is an apocalyptic number.

187990442999 is a deficient number, since it is larger than the sum of its proper divisors (1).

187990442999 is an equidigital number, since it uses as much as digits as its factorization.

187990442999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105815808, while the sum is 71.

The spelling of 187990442999 in words is "one hundred eighty-seven billion, nine hundred ninety million, four hundred forty-two thousand, nine hundred ninety-nine".