40447579 has 4 divisors (see below), whose sum is σ = 40514176. Its totient is φ = 40380984.

The previous prime is 40447543. The next prime is 40447601. The reversal of 40447579 is 97574404.

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 40447579 - 2¹⁹ = 39923291 is a prime.

It is a super-2 number, since 2×40447579² = 3272013293922482, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (40447079) 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, 32379 + ... + 33604.

It is an arithmetic number, because the mean of its divisors is an integer number (10128544).

Almost surely, 2^40447579 is an apocalyptic number.

40447579 is a deficient number, since it is larger than the sum of its proper divisors (66597).

40447579 is an equidigital number, since it uses as much as digits as its factorization.

40447579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66596.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 40447579 is about 6359.8411143676. The cubic root of 40447579 is about 343.2660432008.

The spelling of 40447579 in words is "forty million, four hundred forty-seven thousand, five hundred seventy-nine".