1090204191 has 16 divisors (see below), whose sum is σ = 1635060320. Its totient is φ = 726801336.

The previous prime is 1090204189. The next prime is 1090204207. The reversal of 1090204191 is 1914020901.

It is not a de Polignac number, because 1090204191 - 2¹ = 1090204189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090205191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247060 + ... + 251433.

It is an arithmetic number, because the mean of its divisors is an integer number (102191270).

Almost surely, 2^1090204191 is an apocalyptic number.

1090204191 is a deficient number, since it is larger than the sum of its proper divisors (544856129).

1090204191 is an frugal number, since it uses more digits than its factorization.

1090204191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498514 (or 498496 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1090204191 is about 33018.2402771559. The cubic root of 1090204191 is about 1029.2067260543.

The spelling of 1090204191 in words is "one billion, ninety million, two hundred four thousand, one hundred ninety-one".