40801399 has 4 divisors (see below), whose sum is σ = 40864536. Its totient is φ = 40738264.

The previous prime is 40801393. The next prime is 40801429. The reversal of 40801399 is 99310804.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40801399 - 2¹¹ = 40799351 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 (40801393) 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, 30589 + ... + 31894.

It is an arithmetic number, because the mean of its divisors is an integer number (10216134).

Almost surely, 2^40801399 is an apocalyptic number.

40801399 is a deficient number, since it is larger than the sum of its proper divisors (63137).

40801399 is an equidigital number, since it uses as much as digits as its factorization.

40801399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63136.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 40801399 is about 6387.5972791027. The cubic root of 40801399 is about 344.2640589035.

The spelling of 40801399 in words is "forty million, eight hundred one thousand, three hundred ninety-nine".