1081918403 has 4 divisors (see below), whose sum is σ = 1145560680. Its totient is φ = 1018276128.

The previous prime is 1081918393. The next prime is 1081918417. The reversal of 1081918403 is 3048191801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3048191801 = 509 ⋅5988589.

It is a cyclic number.

It is not a de Polignac number, because 1081918403 - 2¹⁰ = 1081917379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081918433) 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, 31821113 + ... + 31821146.

It is an arithmetic number, because the mean of its divisors is an integer number (286390170).

Almost surely, 2^1081918403 is an apocalyptic number.

1081918403 is a deficient number, since it is larger than the sum of its proper divisors (63642277).

1081918403 is an equidigital number, since it uses as much as digits as its factorization.

1081918403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63642276.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 1081918403 is about 32892.5280724970. The cubic root of 1081918403 is about 1026.5926944066.

The spelling of 1081918403 in words is "one billion, eighty-one million, nine hundred eighteen thousand, four hundred three".