140983991 has 4 divisors (see below), whose sum is σ = 141714672. Its totient is φ = 140253312.

The previous prime is 140983987. The next prime is 140984021. The reversal of 140983991 is 199389041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199389041 = 37 ⋅5388893.

It is a cyclic number.

It is not a de Polignac number, because 140983991 - 2² = 140983987 is a prime.

It is a super-3 number, since 3×140983991³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140983901) 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, 365051 + ... + 365436.

It is an arithmetic number, because the mean of its divisors is an integer number (35428668).

Almost surely, 2^140983991 is an apocalyptic number.

140983991 is a deficient number, since it is larger than the sum of its proper divisors (730681).

140983991 is an equidigital number, since it uses as much as digits as its factorization.

140983991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730680.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 140983991 is about 11873.6679673974. The cubic root of 140983991 is about 520.4630872276.

The spelling of 140983991 in words is "one hundred forty million, nine hundred eighty-three thousand, nine hundred ninety-one".