1649113394 has 4 divisors (see below), whose sum is σ = 2473670094. Its totient is φ = 824556696.

The previous prime is 1649113381. The next prime is 1649113447. The reversal of 1649113394 is 4933119461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4933119461 = 37 ⋅133327553.

It can be written as a sum of positive squares in only one way, i.e., 1590972769 + 58140625 = 39887^2 + 7625^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412278347 + ... + 412278350.

Almost surely, 2^1649113394 is an apocalyptic number.

1649113394 is a deficient number, since it is larger than the sum of its proper divisors (824556700).

1649113394 is an equidigital number, since it uses as much as digits as its factorization.

1649113394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824556699.

The product of its digits is 69984, while the sum is 41.

The square root of 1649113394 is about 40609.2771913020. The cubic root of 1649113394 is about 1181.4540616490.

The spelling of 1649113394 in words is "one billion, six hundred forty-nine million, one hundred thirteen thousand, three hundred ninety-four".