140909597 has 2 divisors, whose sum is σ = 140909598. Its totient is φ = 140909596.

The previous prime is 140909557. The next prime is 140909599. The reversal of 140909597 is 795909041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138556441 + 2353156 = 11771^2 + 1534^2 .

It is an emirp because it is prime and its reverse (795909041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140909597 - 2⁶ = 140909533 is a prime.

Together with 140909599, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140909599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70454798 + 70454799.

It is an arithmetic number, because the mean of its divisors is an integer number (70454799).

Almost surely, 2^140909597 is an apocalyptic number.

It is an amenable number.

140909597 is a deficient number, since it is larger than the sum of its proper divisors (1).

140909597 is an equidigital number, since it uses as much as digits as its factorization.

140909597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 140909597 is about 11870.5348236716. The cubic root of 140909597 is about 520.3715256655.

The spelling of 140909597 in words is "one hundred forty million, nine hundred nine thousand, five hundred ninety-seven".