1845045949 has 4 divisors (see below), whose sum is σ = 1845387936. Its totient is φ = 1844703964.

The previous prime is 1845045931. The next prime is 1845045971. The reversal of 1845045949 is 9495405481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9495405481 = 113 ⋅84030137.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1845045949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1845040949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162769 + ... + 173734.

It is an arithmetic number, because the mean of its divisors is an integer number (461346984).

Almost surely, 2^1845045949 is an apocalyptic number.

It is an amenable number.

1845045949 is a deficient number, since it is larger than the sum of its proper divisors (341987).

1845045949 is an equidigital number, since it uses as much as digits as its factorization.

1845045949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341986.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The square root of 1845045949 is about 42953.9980560599. The cubic root of 1845045949 is about 1226.5042631743.

The spelling of 1845045949 in words is "one billion, eight hundred forty-five million, forty-five thousand, nine hundred forty-nine".