158399 has 4 divisors (see below), whose sum is σ = 159600. Its totient is φ = 157200.

The previous prime is 158393. The next prime is 158407. The reversal of 158399 is 993851.

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

It is a cyclic number.

It is not a de Polignac number, because 158399 - 2⁸ = 158143 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12 and base 16.

It is a zygodrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 158399.

It is not an unprimeable number, because it can be changed into a prime (158393) 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, 374 + ... + 675.

It is an arithmetic number, because the mean of its divisors is an integer number (39900).

2¹⁵⁸³⁹⁹ is an apocalyptic number.

158399 is a deficient number, since it is larger than the sum of its proper divisors (1201).

158399 is a wasteful number, since it uses less digits than its factorization.

158399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200.

The product of its digits is 9720, while the sum is 35.

The square root of 158399 is about 397.9937185434. The cubic root of 158399 is about 54.1066707186.

The spelling of 158399 in words is "one hundred fifty-eight thousand, three hundred ninety-nine".