1018921243 has 8 divisors (see below), whose sum is σ = 1022038688. Its totient is φ = 1015809984.

The previous prime is 1018921201. The next prime is 1018921283. The reversal of 1018921243 is 3421298101.

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 1018921243 - 2⁹ = 1018920731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1018921283) 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, 781330 + ... + 782632.

It is an arithmetic number, because the mean of its divisors is an integer number (127754836).

Almost surely, 2^1018921243 is an apocalyptic number.

1018921243 is a deficient number, since it is larger than the sum of its proper divisors (3117445).

1018921243 is a wasteful number, since it uses less digits than its factorization.

1018921243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1018921243 is about 31920.5457816748. The cubic root of 1018921243 is about 1006.2677146786.

The spelling of 1018921243 in words is "one billion, eighteen million, nine hundred twenty-one thousand, two hundred forty-three".