140117986 has 4 divisors (see below), whose sum is σ = 210176982. Its totient is φ = 70058992.

The previous prime is 140117981. The next prime is 140117987. The reversal of 140117986 is 689711041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689711041 = 47 ⋅14674703.

It can be written as a sum of positive squares in only one way, i.e., 135140625 + 4977361 = 11625^2 + 2231^2 .

It is not an unprimeable number, because it can be changed into a prime (140117981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35029495 + ... + 35029498.

Almost surely, 2^140117986 is an apocalyptic number.

140117986 is a deficient number, since it is larger than the sum of its proper divisors (70058996).

140117986 is an equidigital number, since it uses as much as digits as its factorization.

140117986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70058995.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 140117986 is about 11837.1443346780. The cubic root of 140117986 is about 519.3952362772.

The spelling of 140117986 in words is "one hundred forty million, one hundred seventeen thousand, nine hundred eighty-six".