141989909 has 2 divisors, whose sum is σ = 141989910. Its totient is φ = 141989908.

The previous prime is 141989893. The next prime is 141989993. The reversal of 141989909 is 909989141.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131033809 + 10956100 = 11447^2 + 3310^2 .

It is a cyclic number.

It is not a de Polignac number, because 141989909 - 2⁴ = 141989893 is a prime.

It is a super-2 number, since 2×141989909² = 40322268515656562, 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 (141989009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70994954 + 70994955.

It is an arithmetic number, because the mean of its divisors is an integer number (70994955).

Almost surely, 2^141989909 is an apocalyptic number.

It is an amenable number.

141989909 is a deficient number, since it is larger than the sum of its proper divisors (1).

141989909 is an equidigital number, since it uses as much as digits as its factorization.

141989909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 50.

The square root of 141989909 is about 11915.9518713362. The cubic root of 141989909 is about 521.6979861680.

The spelling of 141989909 in words is "one hundred forty-one million, nine hundred eighty-nine thousand, nine hundred nine".