140731685 has 8 divisors (see below), whose sum is σ = 168983160. Its totient is φ = 112515264.

The previous prime is 140731667. The next prime is 140731699. The reversal of 140731685 is 586137041.

It can be written as a sum of positive squares in 4 ways, for example, as 18164644 + 122567041 = 4262^2 + 11071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140731685 - 2¹² = 140727589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079 + ... + 16811.

It is an arithmetic number, because the mean of its divisors is an integer number (21122895).

Almost surely, 2^140731685 is an apocalyptic number.

It is an amenable number.

140731685 is a deficient number, since it is larger than the sum of its proper divisors (28251475).

140731685 is a wasteful number, since it uses less digits than its factorization.

140731685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17527.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 140731685 is about 11863.0386073721. The cubic root of 140731685 is about 520.1524269618.

The spelling of 140731685 in words is "one hundred forty million, seven hundred thirty-one thousand, six hundred eighty-five".