40005479 has 2 divisors, whose sum is σ = 40005480. Its totient is φ = 40005478.

The previous prime is 40005467. The next prime is 40005541. The reversal of 40005479 is 97450004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40005479 - 2¹⁶ = 39939943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40005409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20002739 + 20002740.

It is an arithmetic number, because the mean of its divisors is an integer number (20002740).

Almost surely, 2^40005479 is an apocalyptic number.

40005479 is a deficient number, since it is larger than the sum of its proper divisors (1).

40005479 is an equidigital number, since it uses as much as digits as its factorization.

40005479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 40005479 is about 6324.9884584875. The cubic root of 40005479 is about 342.0108035528.

The spelling of 40005479 in words is "forty million, five thousand, four hundred seventy-nine".