140177309 has 4 divisors (see below), whose sum is σ = 140723004. Its totient is φ = 139631616.

The previous prime is 140177273. The next prime is 140177311. The reversal of 140177309 is 903771041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903771041 = 6563 ⋅137707.

It can be written as a sum of positive squares in 2 ways, for example, as 68724100 + 71453209 = 8290^2 + 8453^2 .

It is a cyclic number.

It is not a de Polignac number, because 140177309 - 2²⁰ = 139128733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140177339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272462 + ... + 272975.

It is an arithmetic number, because the mean of its divisors is an integer number (35180751).

Almost surely, 2^140177309 is an apocalyptic number.

It is an amenable number.

140177309 is a deficient number, since it is larger than the sum of its proper divisors (545695).

140177309 is an equidigital number, since it uses as much as digits as its factorization.

140177309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545694.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 140177309 is about 11839.6498681338. The cubic root of 140177309 is about 519.4685262645.

The spelling of 140177309 in words is "one hundred forty million, one hundred seventy-seven thousand, three hundred nine".