726312157 has 4 divisors (see below), whose sum is σ = 729351360. Its totient is φ = 723272956.

The previous prime is 726312137. The next prime is 726312161. The reversal of 726312157 is 751213627.

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 an emirpimes, since its reverse is a distinct semiprime: 751213627 = 37 ⋅20303071.

It is a cyclic number.

It is not a de Polignac number, because 726312157 - 2¹⁹ = 725787869 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 (726312137) 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, 1519243 + ... + 1519720.

It is an arithmetic number, because the mean of its divisors is an integer number (182337840).

Almost surely, 2^726312157 is an apocalyptic number.

It is an amenable number.

726312157 is a deficient number, since it is larger than the sum of its proper divisors (3039203).

726312157 is a wasteful number, since it uses less digits than its factorization.

726312157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039202.

The product of its digits is 17640, while the sum is 34.

The square root of 726312157 is about 26950.1791645250. The cubic root of 726312157 is about 898.8925295610.

The spelling of 726312157 in words is "seven hundred twenty-six million, three hundred twelve thousand, one hundred fifty-seven".