40354493 has 4 divisors (see below), whose sum is σ = 40577628. Its totient is φ = 40131360.

The previous prime is 40354487. The next prime is 40354519. The reversal of 40354493 is 39445304.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21187609 + 19166884 = 4603^2 + 4378^2 .

It is a cyclic number.

It is not a de Polignac number, because 40354493 - 2⁶ = 40354429 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 (40354453) 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, 111296 + ... + 111657.

It is an arithmetic number, because the mean of its divisors is an integer number (10144407).

Almost surely, 2^40354493 is an apocalyptic number.

It is an amenable number.

40354493 is a deficient number, since it is larger than the sum of its proper divisors (223135).

40354493 is a wasteful number, since it uses less digits than its factorization.

40354493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223134.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 40354493 is about 6352.5186343686. The cubic root of 40354493 is about 343.0025102735.

Adding to 40354493 its reverse (39445304), we get a palindrome (79799797).

The spelling of 40354493 in words is "forty million, three hundred fifty-four thousand, four hundred ninety-three".