140809807 has 2 divisors, whose sum is σ = 140809808. Its totient is φ = 140809806.

The previous prime is 140809789. The next prime is 140809811. The reversal of 140809807 is 708908041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140809807 is a prime.

It is equal to p_7955290 and since 140809807 and 7955290 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140809897) 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, 70404903 + 70404904.

It is an arithmetic number, because the mean of its divisors is an integer number (70404904).

Almost surely, 2^140809807 is an apocalyptic number.

140809807 is a deficient number, since it is larger than the sum of its proper divisors (1).

140809807 is an equidigital number, since it uses as much as digits as its factorization.

140809807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 140809807 is about 11866.3308145357. The cubic root of 140809807 is about 520.2486569642.

The spelling of 140809807 in words is "one hundred forty million, eight hundred nine thousand, eight hundred seven".