1091887345 has 16 divisors (see below), whose sum is σ = 1398660480. Its totient is φ = 815875200.

The previous prime is 1091887337. The next prime is 1091887393. The reversal of 1091887345 is 5437881901.

It is a happy number.

It is not a de Polignac number, because 1091887345 - 2³ = 1091887337 is a prime.

It is a super-2 number, since 2×1091887345² = 2384435948342298050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1091887295 and 1091887304.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74196 + ... + 87685.

It is an arithmetic number, because the mean of its divisors is an integer number (87416280).

Almost surely, 2^1091887345 is an apocalyptic number.

It is an amenable number.

1091887345 is a deficient number, since it is larger than the sum of its proper divisors (306773135).

1091887345 is a wasteful number, since it uses less digits than its factorization.

1091887345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161976.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 1091887345 is about 33043.7186920601. The cubic root of 1091887345 is about 1029.7361139421.

The spelling of 1091887345 in words is "one billion, ninety-one million, eight hundred eighty-seven thousand, three hundred forty-five".