723136 has 14 divisors (see below), whose sum is σ = 1435100. Its totient is φ = 361536.

The previous prime is 723133. The next prime is 723157. The reversal of 723136 is 631327.

It is not an unprimeable number, because it can be changed into a prime (723133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5586 + ... + 5713.

2⁷²³¹³⁶ is an apocalyptic number.

It is an amenable number.

723136 is a deficient number, since it is larger than the sum of its proper divisors (711964).

723136 is a wasteful number, since it uses less digits than its factorization.

723136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11311 (or 11301 counting only the distinct ones).

The product of its digits is 756, while the sum is 22.

The square root of 723136 is about 850.3740353515. The cubic root of 723136 is about 89.7580331779.

Subtracting from 723136 its reverse (631327), we obtain a square (91809 = 303²).

The spelling of 723136 in words is "seven hundred twenty-three thousand, one hundred thirty-six".