40091403 has 8 divisors (see below), whose sum is σ = 58314816. Its totient is φ = 24297800.

The previous prime is 40091377. The next prime is 40091413. The reversal of 40091403 is 30419004.

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 40091403 - 2¹⁷ = 39960331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40091403.

It is not an unprimeable number, because it can be changed into a prime (40091413) 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, 607413 + ... + 607478.

It is an arithmetic number, because the mean of its divisors is an integer number (7289352).

Almost surely, 2^40091403 is an apocalyptic number.

40091403 is a deficient number, since it is larger than the sum of its proper divisors (18223413).

40091403 is a wasteful number, since it uses less digits than its factorization.

40091403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214905.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 40091403 is about 6331.7772386590. Note that the first 3 decimals coincide. The cubic root of 40091403 is about 342.2554860558.

The spelling of 40091403 in words is "forty million, ninety-one thousand, four hundred three".