157813 has 2 divisors, whose sum is σ = 157814. Its totient is φ = 157812.

The previous prime is 157799. The next prime is 157823. The reversal of 157813 is 318751.

157813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154449 + 3364 = 393^2 + 58^2 .

It is an emirp because it is prime and its reverse (318751) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78906 + 78907.

It is an arithmetic number, because the mean of its divisors is an integer number (78907).

2¹⁵⁷⁸¹³ is an apocalyptic number.

It is an amenable number.

157813 is a deficient number, since it is larger than the sum of its proper divisors (1).

157813 is an equidigital number, since it uses as much as digits as its factorization.

157813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 157813 is about 397.2568438680. The cubic root of 157813 is about 54.0398653953.

The spelling of 157813 in words is "one hundred fifty-seven thousand, eight hundred thirteen".