40764109 has 4 divisors (see below), whose sum is σ = 40975516. Its totient is φ = 40552704.

The previous prime is 40764089. The next prime is 40764131. The reversal of 40764109 is 90146704.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3822025 + 36942084 = 1955^2 + 6078^2 .

It is a cyclic number.

It is not a de Polignac number, because 40764109 - 2⁵ = 40764077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40764179) 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, 105414 + ... + 105799.

It is an arithmetic number, because the mean of its divisors is an integer number (10243879).

Almost surely, 2^40764109 is an apocalyptic number.

It is an amenable number.

40764109 is a deficient number, since it is larger than the sum of its proper divisors (211407).

40764109 is a wasteful number, since it uses less digits than its factorization.

40764109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211406.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 40764109 is about 6384.6776739316. The cubic root of 40764109 is about 344.1591481244.

It can be divided in two parts, 407 and 64109, that added together give a square (64516 = 254²).

The spelling of 40764109 in words is "forty million, seven hundred sixty-four thousand, one hundred nine".