726131157 has 4 divisors (see below), whose sum is σ = 968174880. Its totient is φ = 484087436.

The previous prime is 726131101. The next prime is 726131173. The reversal of 726131157 is 751131627.

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: 751131627 = 3 ⋅250377209.

It is a cyclic number.

It is not a de Polignac number, because 726131157 - 2⁶ = 726131093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726131177) 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, 121021857 + ... + 121021862.

It is an arithmetic number, because the mean of its divisors is an integer number (242043720).

Almost surely, 2^726131157 is an apocalyptic number.

It is an amenable number.

726131157 is a deficient number, since it is larger than the sum of its proper divisors (242043723).

726131157 is a wasteful number, since it uses less digits than its factorization.

726131157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242043722.

The product of its digits is 8820, while the sum is 33.

The square root of 726131157 is about 26946.8209071126. The cubic root of 726131157 is about 898.8178541095.

The spelling of 726131157 in words is "seven hundred twenty-six million, one hundred thirty-one thousand, one hundred fifty-seven".