140605631 has 4 divisors (see below), whose sum is σ = 142586064. Its totient is φ = 138625200.

The previous prime is 140605627. The next prime is 140605669. The reversal of 140605631 is 136506041.

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

It is a cyclic number.

It is not a de Polignac number, because 140605631 - 2² = 140605627 is a prime.

It is a super-2 number, since 2×140605631² = 39539886937816322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140605631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140605331) 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, 990110 + ... + 990251.

It is an arithmetic number, because the mean of its divisors is an integer number (35646516).

Almost surely, 2^140605631 is an apocalyptic number.

140605631 is a deficient number, since it is larger than the sum of its proper divisors (1980433).

140605631 is an equidigital number, since it uses as much as digits as its factorization.

140605631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980432.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 140605631 is about 11857.7245287618. The cubic root of 140605631 is about 519.9970796187.

It can be divided in two parts, 14060 and 5631, that added together give a palindrome (19691).

The spelling of 140605631 in words is "one hundred forty million, six hundred five thousand, six hundred thirty-one".