141919781 has 2 divisors, whose sum is σ = 141919782. Its totient is φ = 141919780.

The previous prime is 141919763. The next prime is 141919793. The reversal of 141919781 is 187919141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88190881 + 53728900 = 9391^2 + 7330^2 .

It is an emirp because it is prime and its reverse (187919141) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 141919781 - 2²² = 137725477 is a prime.

It is a super-2 number, since 2×141919781² = 40282448478175922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (141919741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70959890 + 70959891.

It is an arithmetic number, because the mean of its divisors is an integer number (70959891).

Almost surely, 2^141919781 is an apocalyptic number.

It is an amenable number.

141919781 is a deficient number, since it is larger than the sum of its proper divisors (1).

141919781 is an equidigital number, since it uses as much as digits as its factorization.

141919781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 41.

The square root of 141919781 is about 11913.0088978394. The cubic root of 141919781 is about 521.6120841453.

The spelling of 141919781 in words is "one hundred forty-one million, nine hundred nineteen thousand, seven hundred eighty-one".