40779847 has 4 divisors (see below), whose sum is σ = 40814680. Its totient is φ = 40745016.

The previous prime is 40779839. The next prime is 40779857. The reversal of 40779847 is 74897704.

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 40779847 - 2³ = 40779839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40779797 and 40779806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40779857) 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 in 3 ways as a sum of consecutive naturals, for example, 15597 + ... + 18022.

It is an arithmetic number, because the mean of its divisors is an integer number (10203670).

Almost surely, 2^40779847 is an apocalyptic number.

40779847 is a deficient number, since it is larger than the sum of its proper divisors (34833).

40779847 is a wasteful number, since it uses less digits than its factorization.

40779847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34832.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 40779847 is about 6385.9100369485. The cubic root of 40779847 is about 344.2034328307.

It can be divided in two parts, 4077 and 9847, that added together give a square (13924 = 118²).

The spelling of 40779847 in words is "forty million, seven hundred seventy-nine thousand, eight hundred forty-seven".