140817971 has 4 divisors (see below), whose sum is σ = 160934832. Its totient is φ = 120701112.

The previous prime is 140817961. The next prime is 140817973. The reversal of 140817971 is 179718041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179718041 = 1217 ⋅147673.

It is not a de Polignac number, because 140817971 - 2¹⁴ = 140801587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140817973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10058420 + ... + 10058433.

It is an arithmetic number, because the mean of its divisors is an integer number (40233708).

Almost surely, 2^140817971 is an apocalyptic number.

140817971 is a deficient number, since it is larger than the sum of its proper divisors (20116861).

140817971 is an equidigital number, since it uses as much as digits as its factorization.

140817971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20116860.

The product of its (nonzero) digits is 14112, while the sum is 38.

The square root of 140817971 is about 11866.6748080496. The cubic root of 140817971 is about 520.2587112543.

The spelling of 140817971 in words is "one hundred forty million, eight hundred seventeen thousand, nine hundred seventy-one".