726931157 has 4 divisors (see below), whose sum is σ = 737169696. Its totient is φ = 716692620.

The previous prime is 726931133. The next prime is 726931207. The reversal of 726931157 is 751139627.

726931157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 726931157 - 2¹⁶ = 726865621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726931057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5119163 + ... + 5119304.

It is an arithmetic number, because the mean of its divisors is an integer number (184292424).

Almost surely, 2^726931157 is an apocalyptic number.

It is an amenable number.

726931157 is a deficient number, since it is larger than the sum of its proper divisors (10238539).

726931157 is a wasteful number, since it uses less digits than its factorization.

726931157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10238538.

The product of its digits is 79380, while the sum is 41.

The square root of 726931157 is about 26961.6608724314. The cubic root of 726931157 is about 899.1478176292.

The spelling of 726931157 in words is "seven hundred twenty-six million, nine hundred thirty-one thousand, one hundred fifty-seven".