187990440941 has 2 divisors, whose sum is σ = 187990440942. Its totient is φ = 187990440940.

The previous prime is 187990440877. The next prime is 187990440943. The reversal of 187990440941 is 149044099781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151337338441 + 36653102500 = 389021^2 + 191450^2 .

It is a cyclic number.

It is not a de Polignac number, because 187990440941 - 2⁶ = 187990440877 is a prime.

Together with 187990440943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187990440943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93995220470 + 93995220471.

It is an arithmetic number, because the mean of its divisors is an integer number (93995220471).

Almost surely, 2^187990440941 is an apocalyptic number.

It is an amenable number.

187990440941 is a deficient number, since it is larger than the sum of its proper divisors (1).

187990440941 is an equidigital number, since it uses as much as digits as its factorization.

187990440941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 187990440941 in words is "one hundred eighty-seven billion, nine hundred ninety million, four hundred forty thousand, nine hundred forty-one".