1023383891 has 4 divisors (see below), whose sum is σ = 1023595872. Its totient is φ = 1023171912.

The previous prime is 1023383863. The next prime is 1023383897. The reversal of 1023383891 is 1983833201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1983833201 = 7 ⋅283404743.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023383891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023383897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98576 + ... + 108461.

It is an arithmetic number, because the mean of its divisors is an integer number (255898968).

Almost surely, 2^1023383891 is an apocalyptic number.

1023383891 is a deficient number, since it is larger than the sum of its proper divisors (211981).

1023383891 is an equidigital number, since it uses as much as digits as its factorization.

1023383891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211980.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1023383891 is about 31990.3718484171. The cubic root of 1023383891 is about 1007.7346512618.

The spelling of 1023383891 in words is "one billion, twenty-three million, three hundred eighty-three thousand, eight hundred ninety-one".