140619509 has 2 divisors, whose sum is σ = 140619510. Its totient is φ = 140619508.

The previous prime is 140619449. The next prime is 140619527. The reversal of 140619509 is 905916041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86081284 + 54538225 = 9278^2 + 7385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140619509 is a prime.

It is a super-3 number, since 3×140619509³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140619559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70309754 + 70309755.

It is an arithmetic number, because the mean of its divisors is an integer number (70309755).

Almost surely, 2^140619509 is an apocalyptic number.

It is an amenable number.

140619509 is a deficient number, since it is larger than the sum of its proper divisors (1).

140619509 is an equidigital number, since it uses as much as digits as its factorization.

140619509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 140619509 is about 11858.3097024829. The cubic root of 140619509 is about 520.0141872362.

The spelling of 140619509 in words is "one hundred forty million, six hundred nineteen thousand, five hundred nine".