140026609 has 2 divisors, whose sum is σ = 140026610. Its totient is φ = 140026608.

The previous prime is 140026591. The next prime is 140026613. The reversal of 140026609 is 906620041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137545984 + 2480625 = 11728^2 + 1575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140026609 is a prime.

It is not a weakly prime, because it can be changed into another prime (140026669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70013304 + 70013305.

It is an arithmetic number, because the mean of its divisors is an integer number (70013305).

Almost surely, 2^140026609 is an apocalyptic number.

It is an amenable number.

140026609 is a deficient number, since it is larger than the sum of its proper divisors (1).

140026609 is an equidigital number, since it uses as much as digits as its factorization.

140026609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 140026609 is about 11833.2839482538. The cubic root of 140026609 is about 519.2823050239.

The spelling of 140026609 in words is "one hundred forty million, twenty-six thousand, six hundred nine".