140068394 has 4 divisors (see below), whose sum is σ = 210102594. Its totient is φ = 70034196.

The previous prime is 140068387. The next prime is 140068417. The reversal of 140068394 is 493860041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 126855169 + 13213225 = 11263^2 + 3635^2 .

It is a Curzon number.

It is an unprimeable number.

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, 35017097 + ... + 35017100.

Almost surely, 2^140068394 is an apocalyptic number.

140068394 is a deficient number, since it is larger than the sum of its proper divisors (70034200).

140068394 is an equidigital number, since it uses as much as digits as its factorization.

140068394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70034199.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 140068394 is about 11835.0493873072. The cubic root of 140068394 is about 519.3339524770. Note that the first 3 decimals are identical.

The spelling of 140068394 in words is "one hundred forty million, sixty-eight thousand, three hundred ninety-four".