140291813 has 2 divisors, whose sum is σ = 140291814. Its totient is φ = 140291812.

The previous prime is 140291807. The next prime is 140291861. The reversal of 140291813 is 318192041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101566084 + 38725729 = 10078^2 + 6223^2 .

It is a cyclic number.

It is not a de Polignac number, because 140291813 - 2⁴ = 140291797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140291113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70145906 + 70145907.

It is an arithmetic number, because the mean of its divisors is an integer number (70145907).

Almost surely, 2^140291813 is an apocalyptic number.

It is an amenable number.

140291813 is a deficient number, since it is larger than the sum of its proper divisors (1).

140291813 is an equidigital number, since it uses as much as digits as its factorization.

140291813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 140291813 is about 11844.4844970138. The cubic root of 140291813 is about 519.6099305953.

The spelling of 140291813 in words is "one hundred forty million, two hundred ninety-one thousand, eight hundred thirteen".