141681391 has 2 divisors, whose sum is σ = 141681392.
Its totient is φ = 141681390.
The previous prime is 141681389. The next prime is 141681437. The reversal of 141681391 is 193186141.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 141681391 - 21 = 141681389 is a prime.
Together with 141681389, 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 (141681301) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70840695 + 70840696.
It is an arithmetic number, because the mean of its divisors is an integer number (70840696).
Almost surely, 2141681391 is an apocalyptic number.
141681391 is a deficient number, since it is larger than the sum of its proper divisors (1).
141681391 is an equidigital number, since it uses as much as digits as its factorization.
141681391 is an evil number, because the sum of its binary digits is even.
The product of its digits is 5184, while the sum is 34.
The square root of 141681391 is about 11902.9992438881.
Note that the first 3 decimals coincide.
The cubic root of 141681391 is about 521.3198608602.
The spelling of 141681391 in words is "one hundred forty-one million, six hundred eighty-one thousand, three hundred ninety-one".