440131693 has 4 divisors (see below), whose sum is σ = 441461728. Its totient is φ = 438801660.

The previous prime is 440131691. The next prime is 440131697. The reversal of 440131693 is 396131044.

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 not a de Polignac number, because 440131693 - 2¹ = 440131691 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 (440131691) 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, 664521 + ... + 665182.

It is an arithmetic number, because the mean of its divisors is an integer number (110365432).

Almost surely, 2^440131693 is an apocalyptic number.

It is an amenable number.

440131693 is a deficient number, since it is larger than the sum of its proper divisors (1330035).

440131693 is a wasteful number, since it uses less digits than its factorization.

440131693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330034.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 440131693 is about 20979.3158372717. The cubic root of 440131693 is about 760.6663667373. Note that the first 3 decimals are identical.

The spelling of 440131693 in words is "four hundred forty million, one hundred thirty-one thousand, six hundred ninety-three".