143918931 has 16 divisors (see below), whose sum is σ = 206873856. Its totient is φ = 88470816.

The previous prime is 143918921. The next prime is 143918953. The reversal of 143918931 is 139819341.

It is a happy number.

It is not a de Polignac number, because 143918931 - 2¹⁷ = 143787859 is a prime.

It is a super-2 number, since 2×143918931² = 41425317400365522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 143918931.

It is not an unprimeable number, because it can be changed into a prime (143918921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58186 + ... + 60608.

It is an arithmetic number, because the mean of its divisors is an integer number (12929616).

Almost surely, 2^143918931 is an apocalyptic number.

143918931 is a deficient number, since it is larger than the sum of its proper divisors (62954925).

143918931 is a wasteful number, since it uses less digits than its factorization.

143918931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3962.

The product of its digits is 23328, while the sum is 39.

The square root of 143918931 is about 11996.6216494478. The cubic root of 143918931 is about 524.0498988571.

The spelling of 143918931 in words is "one hundred forty-three million, nine hundred eighteen thousand, nine hundred thirty-one".