140304431 has 2 divisors, whose sum is σ = 140304432. Its totient is φ = 140304430.

The previous prime is 140304421. The next prime is 140304443. The reversal of 140304431 is 134403041.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140304431 - 2¹⁴ = 140288047 is a prime.

It is a super-2 number, since 2×140304431² = 39370666716467522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140304421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70152215 + 70152216.

It is an arithmetic number, because the mean of its divisors is an integer number (70152216).

Almost surely, 2^140304431 is an apocalyptic number.

140304431 is a deficient number, since it is larger than the sum of its proper divisors (1).

140304431 is an equidigital number, since it uses as much as digits as its factorization.

140304431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 140304431 is about 11845.0171380205. The cubic root of 140304431 is about 519.6255082245.

Adding to 140304431 its reverse (134403041), we get a palindrome (274707472).

The spelling of 140304431 in words is "one hundred forty million, three hundred four thousand, four hundred thirty-one".