115729213 has 2 divisors, whose sum is σ = 115729214. Its totient is φ = 115729212.

The previous prime is 115729193. The next prime is 115729223. The reversal of 115729213 is 312927511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79512889 + 36216324 = 8917^2 + 6018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115729213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115729223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57864606 + 57864607.

It is an arithmetic number, because the mean of its divisors is an integer number (57864607).

Almost surely, 2^115729213 is an apocalyptic number.

It is an amenable number.

115729213 is a deficient number, since it is larger than the sum of its proper divisors (1).

115729213 is an equidigital number, since it uses as much as digits as its factorization.

115729213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 31.

The square root of 115729213 is about 10757.7512984824. The cubic root of 115729213 is about 487.3201096521.

The spelling of 115729213 in words is "one hundred fifteen million, seven hundred twenty-nine thousand, two hundred thirteen".