40004693 has 4 divisors (see below), whose sum is σ = 40236108. Its totient is φ = 39773280.

The previous prime is 40004687. The next prime is 40004719. The reversal of 40004693 is 39640004.

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 38217124 + 1787569 = 6182^2 + 1337^2 .

It is a cyclic number.

It is not a de Polignac number, because 40004693 - 2⁴ = 40004677 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 (40004603) 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, 115448 + ... + 115793.

It is an arithmetic number, because the mean of its divisors is an integer number (10059027).

Almost surely, 2^40004693 is an apocalyptic number.

It is an amenable number.

40004693 is a deficient number, since it is larger than the sum of its proper divisors (231415).

40004693 is a wasteful number, since it uses less digits than its factorization.

40004693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231414.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 40004693 is about 6324.9263236816. The cubic root of 40004693 is about 342.0085636742.

Adding to 40004693 its reverse (39640004), we get a palindrome (79644697).

It can be divided in two parts, 40004 and 693, that multiplied together give a palindrome (27722772).

The spelling of 40004693 in words is "forty million, four thousand, six hundred ninety-three".