141660991 has 2 divisors, whose sum is σ = 141660992. Its totient is φ = 141660990.

The previous prime is 141660989. The next prime is 141661019. The reversal of 141660991 is 199066141.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 141660991 - 2¹ = 141660989 is a prime.

It is a super-2 number, since 2×141660991² = 40135672742204162, which contains 22 as substring.

Together with 141660989, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 141660991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (141660931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70830495 + 70830496.

It is an arithmetic number, because the mean of its divisors is an integer number (70830496).

Almost surely, 2^141660991 is an apocalyptic number.

141660991 is a deficient number, since it is larger than the sum of its proper divisors (1).

141660991 is an equidigital number, since it uses as much as digits as its factorization.

141660991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 141660991 is about 11902.1422861601. The cubic root of 141660991 is about 521.2948389064.

The spelling of 141660991 in words is "one hundred forty-one million, six hundred sixty thousand, nine hundred ninety-one".