140702909 has 2 divisors, whose sum is σ = 140702910. Its totient is φ = 140702908.

The previous prime is 140702879. The next prime is 140702911. The reversal of 140702909 is 909207041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74736025 + 65966884 = 8645^2 + 8122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140702909 is a prime.

Together with 140702911, 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 (140702509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70351454 + 70351455.

It is an arithmetic number, because the mean of its divisors is an integer number (70351455).

Almost surely, 2^140702909 is an apocalyptic number.

It is an amenable number.

140702909 is a deficient number, since it is larger than the sum of its proper divisors (1).

140702909 is an equidigital number, since it uses as much as digits as its factorization.

140702909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 140702909 is about 11861.8257026480. The cubic root of 140702909 is about 520.1169719598.

The spelling of 140702909 in words is "one hundred forty million, seven hundred two thousand, nine hundred nine".