140856617 has 4 divisors (see below), whose sum is σ = 153661776. Its totient is φ = 128051460.

The previous prime is 140856601. The next prime is 140856629. The reversal of 140856617 is 716658041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 716658041 = 11 ⋅65150731.

It is a cyclic number.

It is not a de Polignac number, because 140856617 - 2⁴ = 140856601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140856017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6402563 + ... + 6402584.

It is an arithmetic number, because the mean of its divisors is an integer number (38415444).

Almost surely, 2^140856617 is an apocalyptic number.

It is an amenable number.

140856617 is a deficient number, since it is larger than the sum of its proper divisors (12805159).

140856617 is a wasteful number, since it uses less digits than its factorization.

140856617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12805158.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 140856617 is about 11868.3030379242. The cubic root of 140856617 is about 520.3063000647.

It can be divided in two parts, 14085 and 6617, that added together give a palindrome (20702).

The spelling of 140856617 in words is "one hundred forty million, eight hundred fifty-six thousand, six hundred seventeen".