40581679 has 2 divisors, whose sum is σ = 40581680. Its totient is φ = 40581678.

The previous prime is 40581631. The next prime is 40581721. The reversal of 40581679 is 97618504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40581679 - 2¹³ = 40573487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40581479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20290839 + 20290840.

It is an arithmetic number, because the mean of its divisors is an integer number (20290840).

Almost surely, 2^40581679 is an apocalyptic number.

40581679 is a deficient number, since it is larger than the sum of its proper divisors (1).

40581679 is an equidigital number, since it uses as much as digits as its factorization.

40581679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 40581679 is about 6370.3751066951. The cubic root of 40581679 is about 343.6449797529.

The spelling of 40581679 in words is "forty million, five hundred eighty-one thousand, six hundred seventy-nine".