921143143 has 4 divisors (see below), whose sum is σ = 924813288. Its totient is φ = 917473000.

The previous prime is 921143101. The next prime is 921143173. The reversal of 921143143 is 341341129.

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

It is a cyclic number.

It is not a de Polignac number, because 921143143 - 2²¹ = 919045991 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 (921143173) 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, 1834696 + ... + 1835197.

It is an arithmetic number, because the mean of its divisors is an integer number (231203322).

Almost surely, 2^921143143 is an apocalyptic number.

921143143 is a deficient number, since it is larger than the sum of its proper divisors (3670145).

921143143 is a wasteful number, since it uses less digits than its factorization.

921143143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670144.

The product of its digits is 2592, while the sum is 28.

The square root of 921143143 is about 30350.3400804670. The cubic root of 921143143 is about 972.9914885141.

The spelling of 921143143 in words is "nine hundred twenty-one million, one hundred forty-three thousand, one hundred forty-three".