140626609 has 2 divisors, whose sum is σ = 140626610. Its totient is φ = 140626608.

The previous prime is 140626583. The next prime is 140626637. The reversal of 140626609 is 906626041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125440000 + 15186609 = 11200^2 + 3897^2 .

It is a cyclic number.

It is not a de Polignac number, because 140626609 - 2²⁵ = 107072177 is a prime.

It is not a weakly prime, because it can be changed into another prime (140626639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70313304 + 70313305.

It is an arithmetic number, because the mean of its divisors is an integer number (70313305).

Almost surely, 2^140626609 is an apocalyptic number.

It is an amenable number.

140626609 is a deficient number, since it is larger than the sum of its proper divisors (1).

140626609 is an equidigital number, since it uses as much as digits as its factorization.

140626609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 140626609 is about 11858.6090668341. The cubic root of 140626609 is about 520.0229390768.

The spelling of 140626609 in words is "one hundred forty million, six hundred twenty-six thousand, six hundred nine".