140875981 has 2 divisors, whose sum is σ = 140875982. Its totient is φ = 140875980.

The previous prime is 140875963. The next prime is 140875993. The reversal of 140875981 is 189578041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140635881 + 240100 = 11859^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 140875981 - 2⁵ = 140875949 is a prime.

It is a super-2 number, since 2×140875981² = 39692084045424722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140875781) 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 as a sum of consecutive naturals, namely, 70437990 + 70437991.

It is an arithmetic number, because the mean of its divisors is an integer number (70437991).

Almost surely, 2^140875981 is an apocalyptic number.

It is an amenable number.

140875981 is a deficient number, since it is larger than the sum of its proper divisors (1).

140875981 is an equidigital number, since it uses as much as digits as its factorization.

140875981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 140875981 is about 11869.1187962713. The cubic root of 140875981 is about 520.3301416841.

The spelling of 140875981 in words is "one hundred forty million, eight hundred seventy-five thousand, nine hundred eighty-one".