40003091 has 12 divisors (see below), whose sum is σ = 42962808. Its totient is φ = 37235712.

The previous prime is 40003081. The next prime is 40003111. The reversal of 40003091 is 19030004.

It is not a de Polignac number, because 40003091 - 2⁶ = 40003027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (40003001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27320 + ... + 28746.

It is an arithmetic number, because the mean of its divisors is an integer number (3580234).

Almost surely, 2^40003091 is an apocalyptic number.

40003091 is a deficient number, since it is larger than the sum of its proper divisors (2959717).

40003091 is a wasteful number, since it uses less digits than its factorization.

40003091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558 (or 1541 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 40003091 is about 6324.7996806223. The cubic root of 40003091 is about 342.0039983345.

Adding to 40003091 its reverse (19030004), we get a palindrome (59033095).

The spelling of 40003091 in words is "forty million, three thousand, ninety-one".