40168197 has 8 divisors (see below), whose sum is σ = 59508480. Its totient is φ = 26778780.

The previous prime is 40168159. The next prime is 40168207. The reversal of 40168197 is 79186104.

40168197 is a `hidden beast` number, since 401 + 68 + 197 = 666.

It is not a de Polignac number, because 40168197 - 2¹⁶ = 40102661 is a prime.

It is a super-2 number, since 2×40168197² = 3226968100461618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40128197) 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, 743829 + ... + 743882.

It is an arithmetic number, because the mean of its divisors is an integer number (7438560).

Almost surely, 2^40168197 is an apocalyptic number.

It is an amenable number.

40168197 is a deficient number, since it is larger than the sum of its proper divisors (19340283).

40168197 is a wasteful number, since it uses less digits than its factorization.

40168197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487720 (or 1487714 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 40168197 is about 6337.8385116694. The cubic root of 40168197 is about 342.4738737242.

The spelling of 40168197 in words is "forty million, one hundred sixty-eight thousand, one hundred ninety-seven".