115640543 has 2 divisors, whose sum is σ = 115640544. Its totient is φ = 115640542.

The previous prime is 115640533. The next prime is 115640563. The reversal of 115640543 is 345046511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115640543 - 2¹⁸ = 115378399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115640533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57820271 + 57820272.

It is an arithmetic number, because the mean of its divisors is an integer number (57820272).

Almost surely, 2^115640543 is an apocalyptic number.

115640543 is a deficient number, since it is larger than the sum of its proper divisors (1).

115640543 is an equidigital number, since it uses as much as digits as its factorization.

115640543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 115640543 is about 10753.6292943359. The cubic root of 115640543 is about 487.1956187148.

The spelling of 115640543 in words is "one hundred fifteen million, six hundred forty thousand, five hundred forty-three".