143899031 has 4 divisors (see below), whose sum is σ = 147788232. Its totient is φ = 140009832.

The previous prime is 143899003. The next prime is 143899051. The reversal of 143899031 is 130998341.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130998341 = 127 ⋅1031483.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143899031 is a prime.

It is a super-2 number, since 2×143899031² = 41413862245477922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143899051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1944545 + ... + 1944618.

It is an arithmetic number, because the mean of its divisors is an integer number (36947058).

Almost surely, 2^143899031 is an apocalyptic number.

143899031 is a deficient number, since it is larger than the sum of its proper divisors (3889201).

143899031 is an equidigital number, since it uses as much as digits as its factorization.

143899031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3889200.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 143899031 is about 11995.7922206080. The cubic root of 143899031 is about 524.0257438841.

The spelling of 143899031 in words is "one hundred forty-three million, eight hundred ninety-nine thousand, thirty-one".