1091399354 has 16 divisors (see below), whose sum is σ = 1736287488. Its totient is φ = 512743872.

The previous prime is 1091399339. The next prime is 1091399357. The reversal of 1091399354 is 4539931901.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (1091399357) 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, 5804 + ... + 47079.

It is an arithmetic number, because the mean of its divisors is an integer number (108517968).

Almost surely, 2^1091399354 is an apocalyptic number.

1091399354 is a deficient number, since it is larger than the sum of its proper divisors (644888134).

1091399354 is a wasteful number, since it uses less digits than its factorization.

1091399354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53509.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 1091399354 is about 33036.3338462366. Note that the first 3 decimals coincide. The cubic root of 1091399354 is about 1029.5826863817.

The spelling of 1091399354 in words is "one billion, ninety-one million, three hundred ninety-nine thousand, three hundred fifty-four".