40440079 has 2 divisors, whose sum is σ = 40440080. Its totient is φ = 40440078.

The previous prime is 40440077. The next prime is 40440091. The reversal of 40440079 is 97004404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40440079 - 2¹ = 40440077 is a prime.

Together with 40440077, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40440077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20220039 + 20220040.

It is an arithmetic number, because the mean of its divisors is an integer number (20220040).

Almost surely, 2^40440079 is an apocalyptic number.

40440079 is a deficient number, since it is larger than the sum of its proper divisors (1).

40440079 is an equidigital number, since it uses as much as digits as its factorization.

40440079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 40440079 is about 6359.2514496598. The cubic root of 40440079 is about 343.2448251656.

The spelling of 40440079 in words is "forty million, four hundred forty thousand, seventy-nine".