40691005 has 4 divisors (see below), whose sum is σ = 48829212. Its totient is φ = 32552800.

The previous prime is 40690997. The next prime is 40691011. The reversal of 40691005 is 50019604.

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 31382404 + 9308601 = 5602^2 + 3051^2 .

It is not a de Polignac number, because 40691005 - 2³ = 40690997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4069096 + ... + 4069105.

It is an arithmetic number, because the mean of its divisors is an integer number (12207303).

Almost surely, 2^40691005 is an apocalyptic number.

It is an amenable number.

40691005 is a deficient number, since it is larger than the sum of its proper divisors (8138207).

40691005 is an equidigital number, since it uses as much as digits as its factorization.

40691005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8138206.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 40691005 is about 6378.9501487314. The cubic root of 40691005 is about 343.9532933026.

The spelling of 40691005 in words is "forty million, six hundred ninety-one thousand, five".