1949473723 has 4 divisors (see below), whose sum is σ = 2002162240. Its totient is φ = 1896785208.

The previous prime is 1949473717. The next prime is 1949473727. The reversal of 1949473723 is 3273749491.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1949473723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949473727) 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, 26344203 + ... + 26344276.

It is an arithmetic number, because the mean of its divisors is an integer number (500540560).

Almost surely, 2^1949473723 is an apocalyptic number.

1949473723 is a deficient number, since it is larger than the sum of its proper divisors (52688517).

1949473723 is an equidigital number, since it uses as much as digits as its factorization.

1949473723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52688516.

The product of its digits is 1143072, while the sum is 49.

The square root of 1949473723 is about 44152.8450159217. The cubic root of 1949473723 is about 1249.2205750050.

The spelling of 1949473723 in words is "one billion, nine hundred forty-nine million, four hundred seventy-three thousand, seven hundred twenty-three".