721483834 has 4 divisors (see below), whose sum is σ = 1082225754. Its totient is φ = 360741916.

The previous prime is 721483823. The next prime is 721483843. The reversal of 721483834 is 438384127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 438384127 = 9377 ⋅46751.

It can be written as a sum of positive squares in only one way, i.e., 687226225 + 34257609 = 26215^2 + 5853^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180370957 + ... + 180370960.

Almost surely, 2^721483834 is an apocalyptic number.

721483834 is a deficient number, since it is larger than the sum of its proper divisors (360741920).

721483834 is a wasteful number, since it uses less digits than its factorization.

721483834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360741919.

The product of its digits is 129024, while the sum is 40.

The square root of 721483834 is about 26860.4511131142. The cubic root of 721483834 is about 896.8962361542.

The spelling of 721483834 in words is "seven hundred twenty-one million, four hundred eighty-three thousand, eight hundred thirty-four".