140802509 has 2 divisors, whose sum is σ = 140802510. Its totient is φ = 140802508.

The previous prime is 140802491. The next prime is 140802533. The reversal of 140802509 is 905208041.

140802509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87366409 + 53436100 = 9347^2 + 7310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140802509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140801509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70401254 + 70401255.

It is an arithmetic number, because the mean of its divisors is an integer number (70401255).

Almost surely, 2^140802509 is an apocalyptic number.

It is an amenable number.

140802509 is a deficient number, since it is larger than the sum of its proper divisors (1).

140802509 is an equidigital number, since it uses as much as digits as its factorization.

140802509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 140802509 is about 11866.0233018480. The cubic root of 140802509 is about 520.2396688585.

The spelling of 140802509 in words is "one hundred forty million, eight hundred two thousand, five hundred nine".