39200813 has 2 divisors, whose sum is σ = 39200814. Its totient is φ = 39200812.

The previous prime is 39200807. The next prime is 39200831. The reversal of 39200813 is 31800293.

Together with next prime (39200831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38663524 + 537289 = 6218^2 + 733^2 .

It is a cyclic number.

It is not a de Polignac number, because 39200813 - 2²⁰ = 38152237 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

39200813 is a modest number, since divided by 813 gives 392 as remainder.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39200893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19600406 + 19600407.

It is an arithmetic number, because the mean of its divisors is an integer number (19600407).

Almost surely, 2^39200813 is an apocalyptic number.

It is an amenable number.

39200813 is a deficient number, since it is larger than the sum of its proper divisors (1).

39200813 is an equidigital number, since it uses as much as digits as its factorization.

39200813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 39200813 is about 6261.0552624937. The cubic root of 39200813 is about 339.7021988673.

The spelling of 39200813 in words is "thirty-nine million, two hundred thousand, eight hundred thirteen".