40913661 has 4 divisors (see below), whose sum is σ = 54551552. Its totient is φ = 27275772.

The previous prime is 40913659. The next prime is 40913671. The reversal of 40913661 is 16631904.

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 not a de Polignac number, because 40913661 - 2¹ = 40913659 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 (40913651) 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, 6818941 + ... + 6818946.

It is an arithmetic number, because the mean of its divisors is an integer number (13637888).

Almost surely, 2^40913661 is an apocalyptic number.

It is an amenable number.

40913661 is a deficient number, since it is larger than the sum of its proper divisors (13637891).

40913661 is a wasteful number, since it uses less digits than its factorization.

40913661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13637890.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 40913661 is about 6396.3787411316. The cubic root of 40913661 is about 344.5795087110.

The spelling of 40913661 in words is "forty million, nine hundred thirteen thousand, six hundred sixty-one".