158355493 has 4 divisors (see below), whose sum is σ = 167670540. Its totient is φ = 149040448.

The previous prime is 158355479. The next prime is 158355503. The reversal of 158355493 is 394553851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 394553851 = 113 ⋅3491627.

It can be written as a sum of positive squares in 2 ways, for example, as 109453444 + 48902049 = 10462^2 + 6993^2 .

It is a cyclic number.

It is not a de Polignac number, because 158355493 - 2²¹ = 156258341 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 (158355413) 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, 4657498 + ... + 4657531.

It is an arithmetic number, because the mean of its divisors is an integer number (41917635).

Almost surely, 2^158355493 is an apocalyptic number.

It is an amenable number.

158355493 is a deficient number, since it is larger than the sum of its proper divisors (9315047).

158355493 is an equidigital number, since it uses as much as digits as its factorization.

158355493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9315046.

The product of its digits is 324000, while the sum is 43.

The square root of 158355493 is about 12583.9378971767. The cubic root of 158355493 is about 541.0171649017.

The spelling of 158355493 in words is "one hundred fifty-eight million, three hundred fifty-five thousand, four hundred ninety-three".