1090391893 has 8 divisors (see below), whose sum is σ = 1174474400. Its totient is φ = 1008978768.

The previous prime is 1090391837. The next prime is 1090391903. The reversal of 1090391893 is 3981930901.

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 1090391893 - 2²¹ = 1088294741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090391293) 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, 666498 + ... + 668131.

It is an arithmetic number, because the mean of its divisors is an integer number (146809300).

Almost surely, 2^1090391893 is an apocalyptic number.

It is an amenable number.

1090391893 is a deficient number, since it is larger than the sum of its proper divisors (84082507).

1090391893 is a wasteful number, since it uses less digits than its factorization.

1090391893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334691.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 1090391893 is about 33021.0825534234. The cubic root of 1090391893 is about 1029.2657893248.

The spelling of 1090391893 in words is "one billion, ninety million, three hundred ninety-one thousand, eight hundred ninety-three".