40801997 has 8 divisors (see below), whose sum is σ = 41835744. Its totient is φ = 39778128.

The previous prime is 40801979. The next prime is 40802017. The reversal of 40801997 is 79910804.

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 40801997 - 2²⁰ = 39753421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40801997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40801907) 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, 6278 + ... + 11000.

It is an arithmetic number, because the mean of its divisors is an integer number (5229468).

Almost surely, 2^40801997 is an apocalyptic number.

It is an amenable number.

40801997 is a deficient number, since it is larger than the sum of its proper divisors (1033747).

40801997 is a wasteful number, since it uses less digits than its factorization.

40801997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4939.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 40801997 is about 6387.6440883944. The cubic root of 40801997 is about 344.2657407813.

The spelling of 40801997 in words is "forty million, eight hundred one thousand, nine hundred ninety-seven".