143979909 has 4 divisors (see below), whose sum is σ = 191973216. Its totient is φ = 95986604.

The previous prime is 143979893. The next prime is 143979911. The reversal of 143979909 is 909979341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143979909 - 2⁴ = 143979893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143979989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23996649 + ... + 23996654.

It is an arithmetic number, because the mean of its divisors is an integer number (47993304).

Almost surely, 2^143979909 is an apocalyptic number.

It is an amenable number.

143979909 is a deficient number, since it is larger than the sum of its proper divisors (47993307).

143979909 is an equidigital number, since it uses as much as digits as its factorization.

143979909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47993306.

The product of its (nonzero) digits is 551124, while the sum is 51.

The square root of 143979909 is about 11999.1628457989. The cubic root of 143979909 is about 524.1239011731.

The spelling of 143979909 in words is "one hundred forty-three million, nine hundred seventy-nine thousand, nine hundred nine".