158192813 has 2 divisors, whose sum is σ = 158192814. Its totient is φ = 158192812.

The previous prime is 158192809. The next prime is 158192833. The reversal of 158192813 is 318291851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122168809 + 36024004 = 11053^2 + 6002^2 .

It is an emirp because it is prime and its reverse (318291851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158192813 - 2² = 158192809 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158192833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79096406 + 79096407.

It is an arithmetic number, because the mean of its divisors is an integer number (79096407).

Almost surely, 2^158192813 is an apocalyptic number.

It is an amenable number.

158192813 is a deficient number, since it is larger than the sum of its proper divisors (1).

158192813 is an equidigital number, since it uses as much as digits as its factorization.

158192813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 38.

The square root of 158192813 is about 12577.4724408364. The cubic root of 158192813 is about 540.8318375166.

The spelling of 158192813 in words is "one hundred fifty-eight million, one hundred ninety-two thousand, eight hundred thirteen".