1091955446 has 4 divisors (see below), whose sum is σ = 1637933172. Its totient is φ = 545977722.

The previous prime is 1091955409. The next prime is 1091955463. The reversal of 1091955446 is 6445591901.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1091955397 and 1091955406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272988860 + ... + 272988863.

It is an arithmetic number, because the mean of its divisors is an integer number (409483293).

Almost surely, 2^1091955446 is an apocalyptic number.

1091955446 is a deficient number, since it is larger than the sum of its proper divisors (545977726).

1091955446 is an equidigital number, since it uses as much as digits as its factorization.

1091955446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545977725.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 1091955446 is about 33044.7491441530. The cubic root of 1091955446 is about 1029.7575217066.

The spelling of 1091955446 in words is "one billion, ninety-one million, nine hundred fifty-five thousand, four hundred forty-six".