140608291 has 2 divisors, whose sum is σ = 140608292. Its totient is φ = 140608290.

The previous prime is 140608289. The next prime is 140608297. The reversal of 140608291 is 192806041.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140608291 - 2¹ = 140608289 is a prime.

Together with 140608289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (140608297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70304145 + 70304146.

It is an arithmetic number, because the mean of its divisors is an integer number (70304146).

Almost surely, 2^140608291 is an apocalyptic number.

140608291 is a deficient number, since it is larger than the sum of its proper divisors (1).

140608291 is an equidigital number, since it uses as much as digits as its factorization.

140608291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 140608291 is about 11857.8366914037. The cubic root of 140608291 is about 520.0003587276. Note that the first 3 decimals are identical.

The spelling of 140608291 in words is "one hundred forty million, six hundred eight thousand, two hundred ninety-one".