142043989 has 2 divisors, whose sum is σ = 142043990. Its totient is φ = 142043988.

The previous prime is 142043983. The next prime is 142044017. The reversal of 142043989 is 989340241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139641489 + 2402500 = 11817^2 + 1550^2 .

It is a cyclic number.

It is not a de Polignac number, because 142043989 - 2⁷ = 142043861 is a prime.

It is a super-2 number, since 2×142043989² = 40352989622064242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142043983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71021994 + 71021995.

It is an arithmetic number, because the mean of its divisors is an integer number (71021995).

Almost surely, 2^142043989 is an apocalyptic number.

It is an amenable number.

142043989 is a deficient number, since it is larger than the sum of its proper divisors (1).

142043989 is an equidigital number, since it uses as much as digits as its factorization.

142043989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 142043989 is about 11918.2208823297. The cubic root of 142043989 is about 521.7642111698.

The spelling of 142043989 in words is "one hundred forty-two million, forty-three thousand, nine hundred eighty-nine".