157726813 has 4 divisors (see below), whose sum is σ = 157767328. Its totient is φ = 157686300.

The previous prime is 157726769. The next prime is 157726817. The reversal of 157726813 is 318627751.

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 157726813 - 2¹³ = 157718621 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 (157726817) 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, 13713 + ... + 22438.

It is an arithmetic number, because the mean of its divisors is an integer number (39441832).

Almost surely, 2^157726813 is an apocalyptic number.

It is an amenable number.

157726813 is a deficient number, since it is larger than the sum of its proper divisors (40515).

157726813 is an equidigital number, since it uses as much as digits as its factorization.

157726813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40514.

The product of its digits is 70560, while the sum is 40.

The square root of 157726813 is about 12558.9335932634. The cubic root of 157726813 is about 540.3002593972.

The spelling of 157726813 in words is "one hundred fifty-seven million, seven hundred twenty-six thousand, eight hundred thirteen".