723747226 has 4 divisors (see below), whose sum is σ = 1085620842. Its totient is φ = 361873612.

The previous prime is 723747223. The next prime is 723747317. The reversal of 723747226 is 622747327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622747327 = 17021 ⋅36587.

It can be written as a sum of positive squares in only one way, i.e., 414163201 + 309584025 = 20351^2 + 17595^2 .

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 not an unprimeable number, because it can be changed into a prime (723747223) by changing a digit.

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, 180936805 + ... + 180936808.

Almost surely, 2^723747226 is an apocalyptic number.

723747226 is a deficient number, since it is larger than the sum of its proper divisors (361873616).

723747226 is a wasteful number, since it uses less digits than its factorization.

723747226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361873615.

The product of its digits is 197568, while the sum is 40.

The square root of 723747226 is about 26902.5505482287. The cubic root of 723747226 is about 897.8331518727.

The spelling of 723747226 in words is "seven hundred twenty-three million, seven hundred forty-seven thousand, two hundred twenty-six".