158867813 has 4 divisors (see below), whose sum is σ = 171088428. Its totient is φ = 146647200.

The previous prime is 158867791. The next prime is 158867837. The reversal of 158867813 is 318768851.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88021924 + 70845889 = 9382^2 + 8417^2 .

It is a cyclic number.

It is not a de Polignac number, because 158867813 - 2⁶ = 158867749 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 (158867213) 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, 6110288 + ... + 6110313.

It is an arithmetic number, because the mean of its divisors is an integer number (42772107).

Almost surely, 2^158867813 is an apocalyptic number.

158867813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

158867813 is a deficient number, since it is larger than the sum of its proper divisors (12220615).

158867813 is a wasteful number, since it uses less digits than its factorization.

158867813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12220614.

The product of its digits is 322560, while the sum is 47.

The square root of 158867813 is about 12604.2775675562. The cubic root of 158867813 is about 541.5999792089.

The spelling of 158867813 in words is "one hundred fifty-eight million, eight hundred sixty-seven thousand, eight hundred thirteen".