40671779 has 4 divisors (see below), whose sum is σ = 41537184. Its totient is φ = 39806376.

The previous prime is 40671773. The next prime is 40671793. The reversal of 40671779 is 97717604.

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 40671779 - 2²⁰ = 39623203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40671773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432632 + ... + 432725.

It is an arithmetic number, because the mean of its divisors is an integer number (10384296).

Almost surely, 2^40671779 is an apocalyptic number.

40671779 is a deficient number, since it is larger than the sum of its proper divisors (865405).

40671779 is an equidigital number, since it uses as much as digits as its factorization.

40671779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865404.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 40671779 is about 6377.4429828890. The cubic root of 40671779 is about 343.8991135334.

The spelling of 40671779 in words is "forty million, six hundred seventy-one thousand, seven hundred seventy-nine".