40369493 has 4 divisors (see below), whose sum is σ = 40386060. Its totient is φ = 40352928.

The previous prime is 40369489. The next prime is 40369499. The reversal of 40369493 is 39496304.

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 1456849 + 38912644 = 1207^2 + 6238^2 .

It is a cyclic number.

It is not a de Polignac number, because 40369493 - 2² = 40369489 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 (40369499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3830 + ... + 9767.

It is an arithmetic number, because the mean of its divisors is an integer number (10096515).

Almost surely, 2^40369493 is an apocalyptic number.

It is an amenable number.

40369493 is a deficient number, since it is larger than the sum of its proper divisors (16567).

40369493 is a wasteful number, since it uses less digits than its factorization.

40369493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16566.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 40369493 is about 6353.6991587578. The cubic root of 40369493 is about 343.0450036857.

It can be divided in two parts, 403 and 69493, that added together give a palindrome (69896).

The spelling of 40369493 in words is "forty million, three hundred sixty-nine thousand, four hundred ninety-three".