726612131 has 24 divisors (see below), whose sum is σ = 876680064. Its totient is φ = 599840640.

The previous prime is 726612071. The next prime is 726612137. The reversal of 726612131 is 131216627.

It is a de Polignac number, because none of the positive numbers 2^k-726612131 is a prime.

It is a super-2 number, since 2×726612131² = 1055930377832722322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 726612094 and 726612103.

It is not an unprimeable number, because it can be changed into a prime (726612137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 352901 + ... + 354953.

It is an arithmetic number, because the mean of its divisors is an integer number (36528336).

Almost surely, 2^726612131 is an apocalyptic number.

726612131 is a deficient number, since it is larger than the sum of its proper divisors (150067933).

726612131 is a wasteful number, since it uses less digits than its factorization.

726612131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331 (or 2324 counting only the distinct ones).

The product of its digits is 3024, while the sum is 29.

The square root of 726612131 is about 26955.7439333438. The cubic root of 726612131 is about 899.0162629868.

Adding to 726612131 its reverse (131216627), we get a palindrome (857828758).

The spelling of 726612131 in words is "seven hundred twenty-six million, six hundred twelve thousand, one hundred thirty-one".