40121679 has 8 divisors (see below), whose sum is σ = 57610672. Its totient is φ = 24690240.

The previous prime is 40121663. The next prime is 40121681. The reversal of 40121679 is 97612104.

It is a happy number.

40121679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 40121679 - 2⁴ = 40121663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40121629) 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 7 ways as a sum of consecutive naturals, for example, 514342 + ... + 514419.

It is an arithmetic number, because the mean of its divisors is an integer number (7201334).

Almost surely, 2^40121679 is an apocalyptic number.

40121679 is a deficient number, since it is larger than the sum of its proper divisors (17488993).

40121679 is a wasteful number, since it uses less digits than its factorization.

40121679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028777.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 40121679 is about 6334.1675854054. The cubic root of 40121679 is about 342.3416185681.

The spelling of 40121679 in words is "forty million, one hundred twenty-one thousand, six hundred seventy-nine".