158973787393 has 8 divisors (see below), whose sum is σ = 159191988840. Its totient is φ = 158755647360.

The previous prime is 158973787319. The next prime is 158973787447. The reversal of 158973787393 is 393787379851.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12033431809 + 146940355584 = 109697^2 + 383328^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158973787393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158973737393) 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, 7786843 + ... + 7807231.

It is an arithmetic number, because the mean of its divisors is an integer number (19898998605).

Almost surely, 2^158973787393 is an apocalyptic number.

It is an amenable number.

158973787393 is a deficient number, since it is larger than the sum of its proper divisors (218201447).

158973787393 is an equidigital number, since it uses as much as digits as its factorization.

158973787393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30707.

The product of its digits is 240045120, while the sum is 70.

The spelling of 158973787393 in words is "one hundred fifty-eight billion, nine hundred seventy-three million, seven hundred eighty-seven thousand, three hundred ninety-three".