1099415945 has 8 divisors (see below), whose sum is σ = 1332900744. Its totient is φ = 870465024.

The previous prime is 1099415927. The next prime is 1099415957. The reversal of 1099415945 is 5495149901.

It can be written as a sum of positive squares in 4 ways, for example, as 37503376 + 1061912569 = 6124^2 + 32587^2 .

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 1099415945 - 2⁶ = 1099415881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1099415945.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1132934 + ... + 1133903.

It is an arithmetic number, because the mean of its divisors is an integer number (166612593).

Almost surely, 2^1099415945 is an apocalyptic number.

It is an amenable number.

1099415945 is a deficient number, since it is larger than the sum of its proper divisors (233484799).

1099415945 is an equidigital number, since it uses as much as digits as its factorization.

1099415945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266939.

The product of its (nonzero) digits is 291600, while the sum is 47.

The square root of 1099415945 is about 33157.4417740573. The cubic root of 1099415945 is about 1032.0973836076.

The spelling of 1099415945 in words is "one billion, ninety-nine million, four hundred fifteen thousand, nine hundred forty-five".