1081683791 has 4 divisors (see below), whose sum is σ = 1106839272. Its totient is φ = 1056528312.

The previous prime is 1081683787. The next prime is 1081683809. The reversal of 1081683791 is 1973861801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1081683791 - 2² = 1081683787 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 (1081683751) 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, 12577676 + ... + 12577761.

It is an arithmetic number, because the mean of its divisors is an integer number (276709818).

Almost surely, 2^1081683791 is an apocalyptic number.

1081683791 is a deficient number, since it is larger than the sum of its proper divisors (25155481).

1081683791 is an equidigital number, since it uses as much as digits as its factorization.

1081683791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25155480.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 1081683791 is about 32888.9615372696. The cubic root of 1081683791 is about 1026.5184841347.

The spelling of 1081683791 in words is "one billion, eighty-one million, six hundred eighty-three thousand, seven hundred ninety-one".