158747861 has 4 divisors (see below), whose sum is σ = 160319724. Its totient is φ = 157176000.

The previous prime is 158747851. The next prime is 158747867. The reversal of 158747861 is 168747851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168747851 = 10723 ⋅15737.

It can be written as a sum of positive squares in 2 ways, for example, as 74218225 + 84529636 = 8615^2 + 9194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158747861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158747867) 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, 785780 + ... + 785981.

It is an arithmetic number, because the mean of its divisors is an integer number (40079931).

Almost surely, 2^158747861 is an apocalyptic number.

It is an amenable number.

158747861 is a deficient number, since it is larger than the sum of its proper divisors (1571863).

158747861 is a wasteful number, since it uses less digits than its factorization.

158747861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571862.

The product of its digits is 376320, while the sum is 47.

The square root of 158747861 is about 12599.5182844425. The cubic root of 158747861 is about 541.4636344976.

The spelling of 158747861 in words is "one hundred fifty-eight million, seven hundred forty-seven thousand, eight hundred sixty-one".