40779169 has 4 divisors (see below), whose sum is σ = 40893120. Its totient is φ = 40665220.

The previous prime is 40779157. The next prime is 40779173. The reversal of 40779169 is 96197704.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40779169 - 2¹⁵ = 40746401 is a prime.

It is a super-2 number, since 2×40779169² = 3325881248661122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40779139) 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, 56437 + ... + 57154.

It is an arithmetic number, because the mean of its divisors is an integer number (10223280).

Almost surely, 2^40779169 is an apocalyptic number.

It is an amenable number.

40779169 is a deficient number, since it is larger than the sum of its proper divisors (113951).

40779169 is a wasteful number, since it uses less digits than its factorization.

40779169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113950.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 40779169 is about 6385.8569511069. The cubic root of 40779169 is about 344.2015252608.

The spelling of 40779169 in words is "forty million, seven hundred seventy-nine thousand, one hundred sixty-nine".