168746397 has 4 divisors (see below), whose sum is σ = 224995200. Its totient is φ = 112497596.

The previous prime is 168746393. The next prime is 168746407. The reversal of 168746397 is 793647861.

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.

It is a cyclic number.

It is not a de Polignac number, because 168746397 - 2² = 168746393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168746393) 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, 28124397 + ... + 28124402.

It is an arithmetic number, because the mean of its divisors is an integer number (56248800).

Almost surely, 2^168746397 is an apocalyptic number.

It is an amenable number.

168746397 is a deficient number, since it is larger than the sum of its proper divisors (56248803).

168746397 is an equidigital number, since it uses as much as digits as its factorization.

168746397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56248802.

The product of its digits is 1524096, while the sum is 51.

The square root of 168746397 is about 12990.2423764917. The cubic root of 168746397 is about 552.6007918598.

It can be divided in two parts, 1687 and 46397, that added together give a palindrome (48084).

The spelling of 168746397 in words is "one hundred sixty-eight million, seven hundred forty-six thousand, three hundred ninety-seven".