140689671 has 16 divisors (see below), whose sum is σ = 199731168. Its totient is φ = 87782400.

The previous prime is 140689669. The next prime is 140689691. The reversal of 140689671 is 176986041.

It is not a de Polignac number, because 140689671 - 2¹ = 140689669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140689621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1611 + ... + 16851.

It is an arithmetic number, because the mean of its divisors is an integer number (12483198).

Almost surely, 2^140689671 is an apocalyptic number.

140689671 is a deficient number, since it is larger than the sum of its proper divisors (59041497).

140689671 is a wasteful number, since it uses less digits than its factorization.

140689671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15442.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 140689671 is about 11861.2676809859. The cubic root of 140689671 is about 520.1006597540.

The spelling of 140689671 in words is "one hundred forty million, six hundred eighty-nine thousand, six hundred seventy-one".