140155993 has 2 divisors, whose sum is σ = 140155994. Its totient is φ = 140155992.

The previous prime is 140155969. The next prime is 140156087. The reversal of 140155993 is 399551041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94633984 + 45522009 = 9728^2 + 6747^2 .

It is a cyclic number.

It is not a de Polignac number, because 140155993 - 2⁹ = 140155481 is a prime.

It is not a weakly prime, because it can be changed into another prime (140155933) 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, 70077996 + 70077997.

It is an arithmetic number, because the mean of its divisors is an integer number (70077997).

Almost surely, 2^140155993 is an apocalyptic number.

It is an amenable number.

140155993 is a deficient number, since it is larger than the sum of its proper divisors (1).

140155993 is an equidigital number, since it uses as much as digits as its factorization.

140155993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 140155993 is about 11838.7496383698. The cubic root of 140155993 is about 519.4421940131.

The spelling of 140155993 in words is "one hundred forty million, one hundred fifty-five thousand, nine hundred ninety-three".