142911889 has 2 divisors, whose sum is σ = 142911890. Its totient is φ = 142911888.

The previous prime is 142911883. The next prime is 142911893. The reversal of 142911889 is 988119241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141491025 + 1420864 = 11895^2 + 1192^2 .

It is a cyclic number.

It is not a de Polignac number, because 142911889 - 2¹⁹ = 142387601 is a prime.

It is not a weakly prime, because it can be changed into another prime (142911883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71455944 + 71455945.

It is an arithmetic number, because the mean of its divisors is an integer number (71455945).

Almost surely, 2^142911889 is an apocalyptic number.

It is an amenable number.

142911889 is a deficient number, since it is larger than the sum of its proper divisors (1).

142911889 is an equidigital number, since it uses as much as digits as its factorization.

142911889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 43.

The square root of 142911889 is about 11954.5760694388. The cubic root of 142911889 is about 522.8247276707.

The spelling of 142911889 in words is "one hundred forty-two million, nine hundred eleven thousand, eight hundred eighty-nine".