1143905623 has 8 divisors (see below), whose sum is σ = 1319315360. Its totient is φ = 971494560.

The previous prime is 1143905591. The next prime is 1143905641. The reversal of 1143905623 is 3265093411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143905623 - 2⁵ = 1143905591 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 (1143905663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748848 + ... + 750373.

It is an arithmetic number, because the mean of its divisors is an integer number (164914420).

Almost surely, 2^1143905623 is an apocalyptic number.

1143905623 is a deficient number, since it is larger than the sum of its proper divisors (175409737).

1143905623 is a wasteful number, since it uses less digits than its factorization.

1143905623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499337.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 1143905623 is about 33821.6738645502. The cubic root of 1143905623 is about 1045.8355452061.

The spelling of 1143905623 in words is "one billion, one hundred forty-three million, nine hundred five thousand, six hundred twenty-three".