405068197 has 4 divisors (see below), whose sum is σ = 428895756. Its totient is φ = 381240640.

The previous prime is 405068177. The next prime is 405068273. The reversal of 405068197 is 791860504.

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 313502436 + 91565761 = 17706^2 + 9569^2 .

It is not a de Polignac number, because 405068197 - 2²³ = 396679589 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405068117) 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, 11913754 + ... + 11913787.

It is an arithmetic number, because the mean of its divisors is an integer number (107223939).

Almost surely, 2^405068197 is an apocalyptic number.

It is an amenable number.

405068197 is a deficient number, since it is larger than the sum of its proper divisors (23827559).

405068197 is a wasteful number, since it uses less digits than its factorization.

405068197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23827558.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 405068197 is about 20126.3060942638. The cubic root of 405068197 is about 739.9051479351.

The spelling of 405068197 in words is "four hundred five million, sixty-eight thousand, one hundred ninety-seven".