1023859243 has 16 divisors (see below), whose sum is σ = 1130927616. Its totient is φ = 919175040.

The previous prime is 1023859183. The next prime is 1023859253. The reversal of 1023859243 is 3429583201.

It is a cyclic number.

It is not a de Polignac number, because 1023859243 - 2¹³ = 1023851051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023859253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 489546 + ... + 491632.

It is an arithmetic number, because the mean of its divisors is an integer number (70682976).

Almost surely, 2^1023859243 is an apocalyptic number.

1023859243 is a deficient number, since it is larger than the sum of its proper divisors (107068373).

1023859243 is a wasteful number, since it uses less digits than its factorization.

1023859243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1023859243 is about 31997.8005962910. The cubic root of 1023859243 is about 1007.8906548030.

It can be divided in two parts, 102385 and 9243, that added together give a triangular number (111628 = T₄₇₂).

The spelling of 1023859243 in words is "one billion, twenty-three million, eight hundred fifty-nine thousand, two hundred forty-three".