40017961 has 8 divisors (see below), whose sum is σ = 40916960. Its totient is φ = 39127968.

The previous prime is 40017959. The next prime is 40018001. The reversal of 40017961 is 16971004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40017961 - 2¹ = 40017959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40017161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7165 + ... + 11461.

It is an arithmetic number, because the mean of its divisors is an integer number (5114620).

Almost surely, 2^40017961 is an apocalyptic number.

It is an amenable number.

40017961 is a deficient number, since it is larger than the sum of its proper divisors (898999).

40017961 is a wasteful number, since it uses less digits than its factorization.

40017961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 40017961 is about 6325.9751027016. The cubic root of 40017961 is about 342.0463698056.

Adding to 40017961 its reverse (16971004), we get a palindrome (56988965).

The spelling of 40017961 in words is "forty million, seventeen thousand, nine hundred sixty-one".