141699991 has 2 divisors, whose sum is σ = 141699992. Its totient is φ = 141699990.

The previous prime is 141699989. The next prime is 141700037. The reversal of 141699991 is 199996141.

It is a happy number.

141699991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (199996141) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 141699991 - 2¹ = 141699989 is a prime.

Together with 141699989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (141699911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70849995 + 70849996.

It is an arithmetic number, because the mean of its divisors is an integer number (70849996).

Almost surely, 2^141699991 is an apocalyptic number.

141699991 is a deficient number, since it is larger than the sum of its proper divisors (1).

141699991 is an equidigital number, since it uses as much as digits as its factorization.

141699991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 49.

The square root of 141699991 is about 11903.7805339312. The cubic root of 141699991 is about 521.3426729012.

The spelling of 141699991 in words is "one hundred forty-one million, six hundred ninety-nine thousand, nine hundred ninety-one".