140660631 has 20 divisors (see below), whose sum is σ = 210447072. Its totient is φ = 93629088.

The previous prime is 140660621. The next prime is 140660659. The reversal of 140660631 is 136066041.

140660631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 140660631 - 2⁵ = 140660599 is a prime.

It is a super-2 number, since 2×140660631² = 39570826226636322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 140660595 and 140660604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140660621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 88066 + ... + 89648.

Almost surely, 2^140660631 is an apocalyptic number.

140660631 is a deficient number, since it is larger than the sum of its proper divisors (69786441).

140660631 is a wasteful number, since it uses less digits than its factorization.

140660631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2692 (or 2683 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 140660631 is about 11860.0434653504. The cubic root of 140660631 is about 520.0648723306.

The spelling of 140660631 in words is "one hundred forty million, six hundred sixty thousand, six hundred thirty-one".