140027491 has 2 divisors, whose sum is σ = 140027492. Its totient is φ = 140027490.

The previous prime is 140027477. The next prime is 140027539. The reversal of 140027491 is 194720041.

It is a weak prime.

It is an emirp because it is prime and its reverse (194720041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140027491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140027401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70013745 + 70013746.

It is an arithmetic number, because the mean of its divisors is an integer number (70013746).

Almost surely, 2^140027491 is an apocalyptic number.

140027491 is a deficient number, since it is larger than the sum of its proper divisors (1).

140027491 is an equidigital number, since it uses as much as digits as its factorization.

140027491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 140027491 is about 11833.3212159562. The cubic root of 140027491 is about 519.2833953072.

The spelling of 140027491 in words is "one hundred forty million, twenty-seven thousand, four hundred ninety-one".