40621169 has 4 divisors (see below), whose sum is σ = 40634100. Its totient is φ = 40608240.

The previous prime is 40621121. The next prime is 40621223. The reversal of 40621169 is 96112604.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 24137569 + 16483600 = 4913^2 + 4060^2 .

It is a cyclic number.

It is not a de Polignac number, because 40621169 - 2²⁰ = 39572593 is a prime.

It is a super-2 number, since 2×40621169² = 3300158741853122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40621969) 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, 1607 + ... + 9155.

It is an arithmetic number, because the mean of its divisors is an integer number (10158525).

Almost surely, 2^40621169 is an apocalyptic number.

It is an amenable number.

40621169 is a deficient number, since it is larger than the sum of its proper divisors (12931).

40621169 is an equidigital number, since it uses as much as digits as its factorization.

40621169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12930.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 40621169 is about 6373.4738565401. The cubic root of 40621169 is about 343.7564105030.

The spelling of 40621169 in words is "forty million, six hundred twenty-one thousand, one hundred sixty-nine".