140649973 has 2 divisors, whose sum is σ = 140649974. Its totient is φ = 140649972.

The previous prime is 140649953. The next prime is 140649979. The reversal of 140649973 is 379946041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128097124 + 12552849 = 11318^2 + 3543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140649973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140649979) 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, 70324986 + 70324987.

It is an arithmetic number, because the mean of its divisors is an integer number (70324987).

Almost surely, 2^140649973 is an apocalyptic number.

It is an amenable number.

140649973 is a deficient number, since it is larger than the sum of its proper divisors (1).

140649973 is an equidigital number, since it uses as much as digits as its factorization.

140649973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 140649973 is about 11859.5941330216. The cubic root of 140649973 is about 520.0517367163.

The spelling of 140649973 in words is "one hundred forty million, six hundred forty-nine thousand, nine hundred seventy-three".