140351409 has 27 divisors (see below), whose sum is σ = 223457689. Its totient is φ = 84824520.

The previous prime is 140351389. The next prime is 140351413. The reversal of 140351409 is 904153041.

The square root of 140351409 is 11847.

It is a perfect power (a square), and thus also a powerful number.

140351409 is a `hidden beast` number, since 140 + 3 + 514 + 0 + 9 = 666.

It is not a de Polignac number, because 140351409 - 2¹¹ = 140349361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140351429) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 390772 + ... + 391130.

Almost surely, 2^140351409 is an apocalyptic number.

140351409 is the 11847-th square number.

140351409 is the 5924-th centered octagonal number.

It is an amenable number.

140351409 is a deficient number, since it is larger than the sum of its proper divisors (83106280).

140351409 is an equidigital number, since it uses as much as digits as its factorization.

140351409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The cubic root of 140351409 is about 519.6834969921.

The spelling of 140351409 in words is "one hundred forty million, three hundred fifty-one thousand, four hundred nine".