726613157 has 4 divisors (see below), whose sum is σ = 726686880. Its totient is φ = 726539436.

The previous prime is 726613127. The next prime is 726613169. The reversal of 726613157 is 751316627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 726613157 - 2¹² = 726609061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 726613157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726613117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19283 + ... + 42720.

It is an arithmetic number, because the mean of its divisors is an integer number (181671720).

Almost surely, 2^726613157 is an apocalyptic number.

It is an amenable number.

726613157 is a deficient number, since it is larger than the sum of its proper divisors (73723).

726613157 is a wasteful number, since it uses less digits than its factorization.

726613157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73722.

The product of its digits is 52920, while the sum is 38.

The square root of 726613157 is about 26955.7629645314. The cubic root of 726613157 is about 899.0166861334.

The spelling of 726613157 in words is "seven hundred twenty-six million, six hundred thirteen thousand, one hundred fifty-seven".