143312987 has 4 divisors (see below), whose sum is σ = 143391456. Its totient is φ = 143234520.

The previous prime is 143312929. The next prime is 143313017. The reversal of 143312987 is 789213341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789213341 = 7 ⋅112744763.

It is a cyclic number.

It is not a de Polignac number, because 143312987 - 2²⁴ = 126535771 is a prime.

It is a super-2 number, since 2×143312987² = 41077224485724338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143312987.

It is not an unprimeable number, because it can be changed into a prime (143312087) 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, 36428 + ... + 40169.

It is an arithmetic number, because the mean of its divisors is an integer number (35847864).

Almost surely, 2^143312987 is an apocalyptic number.

143312987 is a deficient number, since it is larger than the sum of its proper divisors (78469).

143312987 is an equidigital number, since it uses as much as digits as its factorization.

143312987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78468.

The product of its digits is 36288, while the sum is 38.

The square root of 143312987 is about 11971.3402340757. The cubic root of 143312987 is about 523.3133925715.

The spelling of 143312987 in words is "one hundred forty-three million, three hundred twelve thousand, nine hundred eighty-seven".