140640073 has 8 divisors (see below), whose sum is σ = 161548992. Its totient is φ = 119935536.

The previous prime is 140640067. The next prime is 140640083. The reversal of 140640073 is 370046041.

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

It is not a de Polignac number, because 140640073 - 2⁹ = 140639561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140640013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49615 + ... + 52372.

It is an arithmetic number, because the mean of its divisors is an integer number (20193624).

Almost surely, 2^140640073 is an apocalyptic number.

It is an amenable number.

140640073 is a deficient number, since it is larger than the sum of its proper divisors (20908919).

140640073 is a wasteful number, since it uses less digits than its factorization.

140640073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102191.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 140640073 is about 11859.1767420846. The cubic root of 140640073 is about 520.0395347161.

The spelling of 140640073 in words is "one hundred forty million, six hundred forty thousand, seventy-three".