143694413 has 4 divisors (see below), whose sum is σ = 143830908. Its totient is φ = 143557920.

The previous prime is 143694403. The next prime is 143694427. The reversal of 143694413 is 314496341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129458884 + 14235529 = 11378^2 + 3773^2 .

It is a cyclic number.

It is not a de Polignac number, because 143694413 - 2⁸ = 143694157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143694403) 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 3 ways as a sum of consecutive naturals, for example, 66656 + ... + 68777.

It is an arithmetic number, because the mean of its divisors is an integer number (35957727).

Almost surely, 2^143694413 is an apocalyptic number.

It is an amenable number.

143694413 is a deficient number, since it is larger than the sum of its proper divisors (136495).

143694413 is a wasteful number, since it uses less digits than its factorization.

143694413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136494.

The product of its digits is 31104, while the sum is 35.

The square root of 143694413 is about 11987.2604459902. The cubic root of 143694413 is about 523.7772456554. Note that the first 3 decimals are identical.

The spelling of 143694413 in words is "one hundred forty-three million, six hundred ninety-four thousand, four hundred thirteen".