140002409 has 2 divisors, whose sum is σ = 140002410. Its totient is φ = 140002408.

The previous prime is 140002399. The next prime is 140002483. The reversal of 140002409 is 904200041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100060009 + 39942400 = 10003^2 + 6320^2 .

It is a cyclic number.

It is not a de Polignac number, because 140002409 - 2¹⁶ = 139936873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140002609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70001204 + 70001205.

It is an arithmetic number, because the mean of its divisors is an integer number (70001205).

Almost surely, 2^140002409 is an apocalyptic number.

It is an amenable number.

140002409 is a deficient number, since it is larger than the sum of its proper divisors (1).

140002409 is an equidigital number, since it uses as much as digits as its factorization.

140002409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 140002409 is about 11832.2613645913. The cubic root of 140002409 is about 519.2523884343.

The spelling of 140002409 in words is "one hundred forty million, two thousand, four hundred nine".