140136949 has 2 divisors, whose sum is σ = 140136950. Its totient is φ = 140136948.

The previous prime is 140136923. The next prime is 140136979. The reversal of 140136949 is 949631041.

140136949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79530724 + 60606225 = 8918^2 + 7785^2 .

It is an emirp because it is prime and its reverse (949631041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140136949 - 2⁵ = 140136917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140136979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70068474 + 70068475.

It is an arithmetic number, because the mean of its divisors is an integer number (70068475).

Almost surely, 2^140136949 is an apocalyptic number.

It is an amenable number.

140136949 is a deficient number, since it is larger than the sum of its proper divisors (1).

140136949 is an equidigital number, since it uses as much as digits as its factorization.

140136949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 140136949 is about 11837.9453031343. The cubic root of 140136949 is about 519.4186661686.

The spelling of 140136949 in words is "one hundred forty million, one hundred thirty-six thousand, nine hundred forty-nine".