140851989 has 12 divisors (see below), whose sum is σ = 206788972. Its totient is φ = 92361600.

The previous prime is 140851861. The next prime is 140851993. The reversal of 140851989 is 989158041.

It can be written as a sum of positive squares in 2 ways, for example, as 60606225 + 80245764 = 7785^2 + 8958^2 .

It is not a de Polignac number, because 140851989 - 2⁷ = 140851861 is a prime.

It is a super-2 number, since 2×140851989² = 39678565610512242, which contains 22 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 (140855989) 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 11 ways as a sum of consecutive naturals, for example, 127732 + ... + 128829.

Almost surely, 2^140851989 is an apocalyptic number.

It is an amenable number.

140851989 is a deficient number, since it is larger than the sum of its proper divisors (65936983).

140851989 is a wasteful number, since it uses less digits than its factorization.

140851989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256628 (or 256625 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 140851989 is about 11868.1080632087. The cubic root of 140851989 is about 520.3006015892.

The spelling of 140851989 in words is "one hundred forty million, eight hundred fifty-one thousand, nine hundred eighty-nine".