158772673 has 4 divisors (see below), whose sum is σ = 168112260. Its totient is φ = 149433088.

The previous prime is 158772671. The next prime is 158772701. The reversal of 158772673 is 376277851.

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

It can be written as a sum of positive squares in 2 ways, for example, as 140351409 + 18421264 = 11847^2 + 4292^2 .

It is a cyclic number.

It is not a de Polignac number, because 158772673 - 2¹ = 158772671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158772671) 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, 4669768 + ... + 4669801.

It is an arithmetic number, because the mean of its divisors is an integer number (42028065).

Almost surely, 2^158772673 is an apocalyptic number.

It is an amenable number.

158772673 is a deficient number, since it is larger than the sum of its proper divisors (9339587).

158772673 is an equidigital number, since it uses as much as digits as its factorization.

158772673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9339586.

The product of its digits is 493920, while the sum is 46.

The square root of 158772673 is about 12600.5028867899. The cubic root of 158772673 is about 541.4918429529.

The spelling of 158772673 in words is "one hundred fifty-eight million, seven hundred seventy-two thousand, six hundred seventy-three".