140320403 has 4 divisors (see below), whose sum is σ = 140466480. Its totient is φ = 140174328.

The previous prime is 140320399. The next prime is 140320417. The reversal of 140320403 is 304023041.

140320403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304023041 = 7 ⋅43431863.

It is a cyclic number.

It is not a de Polignac number, because 140320403 - 2² = 140320399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140320483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71588 + ... + 73521.

It is an arithmetic number, because the mean of its divisors is an integer number (35116620).

Almost surely, 2^140320403 is an apocalyptic number.

140320403 is a deficient number, since it is larger than the sum of its proper divisors (146077).

140320403 is an equidigital number, since it uses as much as digits as its factorization.

140320403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146076.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 140320403 is about 11845.6913263853. The cubic root of 140320403 is about 519.6452252158.

Adding to 140320403 its reverse (304023041), we get a palindrome (444343444).

The spelling of 140320403 in words is "one hundred forty million, three hundred twenty thousand, four hundred three".