397194242 has 8 divisors (see below), whose sum is σ = 601933836. Its totient is φ = 196549632.

The previous prime is 397194233. The next prime is 397194247. The reversal of 397194242 is 242491793.

It can be written as a sum of positive squares in 2 ways, for example, as 392000401 + 5193841 = 19799^2 + 2279^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 397194242.

It is not an unprimeable number, because it can be changed into a prime (397194247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1023503 + ... + 1023890.

Almost surely, 2^397194242 is an apocalyptic number.

397194242 is a deficient number, since it is larger than the sum of its proper divisors (204739594).

397194242 is a wasteful number, since it uses less digits than its factorization.

397194242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047492.

The product of its digits is 108864, while the sum is 41.

The square root of 397194242 is about 19929.7326123558. The cubic root of 397194242 is about 735.0795057993.

The spelling of 397194242 in words is "three hundred ninety-seven million, one hundred ninety-four thousand, two hundred forty-two".