40619917 has 4 divisors (see below), whose sum is σ = 43744540. Its totient is φ = 37495296.

The previous prime is 40619899. The next prime is 40619921. The reversal of 40619917 is 71991604.

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 6817321 + 33802596 = 2611^2 + 5814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40619917 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 (40619947) 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, 1562292 + ... + 1562317.

It is an arithmetic number, because the mean of its divisors is an integer number (10936135).

Almost surely, 2^40619917 is an apocalyptic number.

It is an amenable number.

40619917 is a deficient number, since it is larger than the sum of its proper divisors (3124623).

40619917 is a wasteful number, since it uses less digits than its factorization.

40619917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124622.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 40619917 is about 6373.3756361915. The cubic root of 40619917 is about 343.7528787858.

The spelling of 40619917 in words is "forty million, six hundred nineteen thousand, nine hundred seventeen".