1093788931 has 16 divisors (see below), whose sum is σ = 1147773888. Its totient is φ = 1041206400.

The previous prime is 1093788901. The next prime is 1093788937. The reversal of 1093788931 is 1398873901.

It is a 7-Lehmer number, since φ(1093788931) divides (1093788931-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 1093788931 - 2⁷ = 1093788803 is a prime.

It is a super-2 number, since 2×1093788931² = 2392748451156245522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1093788937) by changing a digit.

It is a nontrivial repunit in base 1030.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1060386 + ... + 1061416.

It is an arithmetic number, because the mean of its divisors is an integer number (71735868).

Almost surely, 2^1093788931 is an apocalyptic number.

1093788931 is a deficient number, since it is larger than the sum of its proper divisors (53984957).

1093788931 is a wasteful number, since it uses less digits than its factorization.

1093788931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 1093788931 is about 33072.4799644659. The cubic root of 1093788931 is about 1030.3335492458. Note that the first 3 decimals are identical.

The spelling of 1093788931 in words is "one billion, ninety-three million, seven hundred eighty-eight thousand, nine hundred thirty-one".