158240039 has 4 divisors (see below), whose sum is σ = 160834200. Its totient is φ = 155645880.

The previous prime is 158240021. The next prime is 158240041. The reversal of 158240039 is 930042851.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158240039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 158239987 and 158240014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158240099) 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, 1296989 + ... + 1297110.

It is an arithmetic number, because the mean of its divisors is an integer number (40208550).

Almost surely, 2^158240039 is an apocalyptic number.

158240039 is a deficient number, since it is larger than the sum of its proper divisors (2594161).

158240039 is an equidigital number, since it uses as much as digits as its factorization.

158240039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594160.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 158240039 is about 12579.3497049728. The cubic root of 158240039 is about 540.8856511352.

The spelling of 158240039 in words is "one hundred fifty-eight million, two hundred forty thousand, thirty-nine".