138052813 has 2 divisors, whose sum is σ = 138052814. Its totient is φ = 138052812.

The previous prime is 138052799. The next prime is 138052819. The reversal of 138052813 is 318250831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97259044 + 40793769 = 9862^2 + 6387^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138052813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138052819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69026406 + 69026407.

It is an arithmetic number, because the mean of its divisors is an integer number (69026407).

Almost surely, 2^138052813 is an apocalyptic number.

It is an amenable number.

138052813 is a deficient number, since it is larger than the sum of its proper divisors (1).

138052813 is an equidigital number, since it uses as much as digits as its factorization.

138052813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 138052813 is about 11749.5877800032. The cubic root of 138052813 is about 516.8308393068.

The spelling of 138052813 in words is "one hundred thirty-eight million, fifty-two thousand, eight hundred thirteen".