140533409 has 2 divisors, whose sum is σ = 140533410. Its totient is φ = 140533408.

The previous prime is 140533387. The next prime is 140533429. The reversal of 140533409 is 904335041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125104225 + 15429184 = 11185^2 + 3928^2 .

It is a cyclic number.

It is not a de Polignac number, because 140533409 - 2¹² = 140529313 is a prime.

It is a super-2 number, since 2×140533409² = 39499278090322562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140533429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70266704 + 70266705.

It is an arithmetic number, because the mean of its divisors is an integer number (70266705).

Almost surely, 2^140533409 is an apocalyptic number.

It is an amenable number.

140533409 is a deficient number, since it is larger than the sum of its proper divisors (1).

140533409 is an equidigital number, since it uses as much as digits as its factorization.

140533409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 140533409 is about 11854.6787809708. The cubic root of 140533409 is about 519.9080323055.

The spelling of 140533409 in words is "one hundred forty million, five hundred thirty-three thousand, four hundred nine".