40194979 has 4 divisors (see below), whose sum is σ = 43849080. Its totient is φ = 36540880.

The previous prime is 40194971. The next prime is 40194997. The reversal of 40194979 is 97949104.

40194979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40194979 - 2³ = 40194971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40194971) 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, 1827034 + ... + 1827055.

It is an arithmetic number, because the mean of its divisors is an integer number (10962270).

Almost surely, 2^40194979 is an apocalyptic number.

40194979 is a deficient number, since it is larger than the sum of its proper divisors (3654101).

40194979 is a wasteful number, since it uses less digits than its factorization.

40194979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654100.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 40194979 is about 6339.9510250474. The cubic root of 40194979 is about 342.5499712194.

It can be divided in two parts, 4019 and 4979, that added together give a palindrome (8998).

The spelling of 40194979 in words is "forty million, one hundred ninety-four thousand, nine hundred seventy-nine".