140266549 has 2 divisors, whose sum is σ = 140266550. Its totient is φ = 140266548.

The previous prime is 140266517. The next prime is 140266573. The reversal of 140266549 is 945662041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124322500 + 15944049 = 11150^2 + 3993^2 .

It is a cyclic number.

It is not a de Polignac number, because 140266549 - 2⁵ = 140266517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140261549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70133274 + 70133275.

It is an arithmetic number, because the mean of its divisors is an integer number (70133275).

Almost surely, 2^140266549 is an apocalyptic number.

It is an amenable number.

140266549 is a deficient number, since it is larger than the sum of its proper divisors (1).

140266549 is an equidigital number, since it uses as much as digits as its factorization.

140266549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 140266549 is about 11843.4179610449. The cubic root of 140266549 is about 519.5787379617.

The spelling of 140266549 in words is "one hundred forty million, two hundred sixty-six thousand, five hundred forty-nine".