140209685 has 32 divisors (see below), whose sum is σ = 210622464. Its totient is φ = 87048000.

The previous prime is 140209673. The next prime is 140209723. The reversal of 140209685 is 586902041.

140209685 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 140209685 - 2¹² = 140205589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119150 + ... + 120320.

It is an arithmetic number, because the mean of its divisors is an integer number (6581952).

Almost surely, 2^140209685 is an apocalyptic number.

It is an amenable number.

140209685 is a deficient number, since it is larger than the sum of its proper divisors (70412779).

140209685 is a wasteful number, since it uses less digits than its factorization.

140209685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 140209685 is about 11841.0170593577. The cubic root of 140209685 is about 519.5085161375.

The spelling of 140209685 in words is "one hundred forty million, two hundred nine thousand, six hundred eighty-five".