40197759 has 8 divisors (see below), whose sum is σ = 61253760. Its totient is φ = 22970136.

The previous prime is 40197739. The next prime is 40197763. The reversal of 40197759 is 95779104.

It is a happy number.

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

It is not a de Polignac number, because 40197759 - 2⁵ = 40197727 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 40197759.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40197739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957069 + ... + 957110.

It is an arithmetic number, because the mean of its divisors is an integer number (7656720).

Almost surely, 2^40197759 is an apocalyptic number.

40197759 is a deficient number, since it is larger than the sum of its proper divisors (21056001).

40197759 is a wasteful number, since it uses less digits than its factorization.

40197759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914189.

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 40197759 is about 6340.1702658525. The cubic root of 40197759 is about 342.5578682835.

The spelling of 40197759 in words is "forty million, one hundred ninety-seven thousand, seven hundred fifty-nine".