40249493 has 4 divisors (see below), whose sum is σ = 40430208. Its totient is φ = 40068780.

The previous prime is 40249487. The next prime is 40249511. The reversal of 40249493 is 39494204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40249493 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 (40249423) 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 3 ways as a sum of consecutive naturals, for example, 90023 + ... + 90468.

It is an arithmetic number, because the mean of its divisors is an integer number (10107552).

Almost surely, 2^40249493 is an apocalyptic number.

It is an amenable number.

40249493 is a deficient number, since it is larger than the sum of its proper divisors (180715).

40249493 is a wasteful number, since it uses less digits than its factorization.

40249493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180714.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 40249493 is about 6344.2488129013. The cubic root of 40249493 is about 342.7047611453.

The spelling of 40249493 in words is "forty million, two hundred forty-nine thousand, four hundred ninety-three".