143838631 has 2 divisors, whose sum is σ = 143838632. Its totient is φ = 143838630.

The previous prime is 143838571. The next prime is 143838641. The reversal of 143838631 is 136838341.

143838631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143838631 - 2⁷ = 143838503 is a prime.

It is a super-2 number, since 2×143838631² = 41379103535908322, 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 (143838641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71919315 + 71919316.

It is an arithmetic number, because the mean of its divisors is an integer number (71919316).

Almost surely, 2^143838631 is an apocalyptic number.

143838631 is a deficient number, since it is larger than the sum of its proper divisors (1).

143838631 is an equidigital number, since it uses as much as digits as its factorization.

143838631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 143838631 is about 11993.2744069332. The cubic root of 143838631 is about 523.9524156526.

The spelling of 143838631 in words is "one hundred forty-three million, eight hundred thirty-eight thousand, six hundred thirty-one".