140305807 has 2 divisors, whose sum is σ = 140305808. Its totient is φ = 140305806.

The previous prime is 140305771. The next prime is 140305831. The reversal of 140305807 is 708503041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140305807 - 2¹⁵ = 140273039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140305877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70152903 + 70152904.

It is an arithmetic number, because the mean of its divisors is an integer number (70152904).

Almost surely, 2^140305807 is an apocalyptic number.

140305807 is a deficient number, since it is larger than the sum of its proper divisors (1).

140305807 is an equidigital number, since it uses as much as digits as its factorization.

140305807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 140305807 is about 11845.0752213736. The cubic root of 140305807 is about 519.6272069173.

Adding to 140305807 its reverse (708503041), we get a palindrome (848808848).

The spelling of 140305807 in words is "one hundred forty million, three hundred five thousand, eight hundred seven".