431143887 has 4 divisors (see below), whose sum is σ = 574858520. Its totient is φ = 287429256.

The previous prime is 431143883. The next prime is 431143891. The reversal of 431143887 is 788341134.

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

It is an interprime number because it is at equal distance from previous prime (431143883) and next prime (431143891).

It is not a de Polignac number, because 431143887 - 2² = 431143883 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 (431143883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71857312 + ... + 71857317.

It is an arithmetic number, because the mean of its divisors is an integer number (143714630).

Almost surely, 2^431143887 is an apocalyptic number.

431143887 is a deficient number, since it is larger than the sum of its proper divisors (143714633).

431143887 is a wasteful number, since it uses less digits than its factorization.

431143887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143714632.

The product of its digits is 64512, while the sum is 39.

The square root of 431143887 is about 20764.0045993060. The cubic root of 431143887 is about 755.4529317420.

The spelling of 431143887 in words is "four hundred thirty-one million, one hundred forty-three thousand, eight hundred eighty-seven".