158445993 has 8 divisors (see below), whose sum is σ = 211598656. Its totient is φ = 105462000.

The previous prime is 158445983. The next prime is 158446003. The reversal of 158445993 is 399544851.

158445993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (158445983) and next prime (158446003).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 158445993 - 2¹⁰ = 158444969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (158445913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39958 + ... + 43743.

It is an arithmetic number, because the mean of its divisors is an integer number (26449832).

Almost surely, 2^158445993 is an apocalyptic number.

It is an amenable number.

158445993 is a deficient number, since it is larger than the sum of its proper divisors (53152663).

158445993 is an equidigital number, since it uses as much as digits as its factorization.

158445993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84335.

The product of its digits is 777600, while the sum is 48.

The square root of 158445993 is about 12587.5332372947. The cubic root of 158445993 is about 541.1202088572.

The spelling of 158445993 in words is "one hundred fifty-eight million, four hundred forty-five thousand, nine hundred ninety-three".