168397837 has 4 divisors (see below), whose sum is σ = 168588576. Its totient is φ = 168207100.

The previous prime is 168397829. The next prime is 168397849. The reversal of 168397837 is 738793861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 738793861 = 13 ⋅56830297.

It is a cyclic number.

It is not a de Polignac number, because 168397837 - 2³ = 168397829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168397807) 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, 94039 + ... + 95812.

It is an arithmetic number, because the mean of its divisors is an integer number (42147144).

Almost surely, 2^168397837 is an apocalyptic number.

It is an amenable number.

168397837 is a deficient number, since it is larger than the sum of its proper divisors (190739).

168397837 is an equidigital number, since it uses as much as digits as its factorization.

168397837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190738.

The product of its digits is 1524096, while the sum is 52.

The square root of 168397837 is about 12976.8192173583. The cubic root of 168397837 is about 552.2200483133.

The spelling of 168397837 in words is "one hundred sixty-eight million, three hundred ninety-seven thousand, eight hundred thirty-seven".