100243139 has 2 divisors, whose sum is σ = 100243140. Its totient is φ = 100243138.

The previous prime is 100243079. The next prime is 100243153. The reversal of 100243139 is 931342001.

It is a strong prime.

It is an emirp because it is prime and its reverse (931342001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100243139 - 2¹⁶ = 100177603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100243159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50121569 + 50121570.

It is an arithmetic number, because the mean of its divisors is an integer number (50121570).

Almost surely, 2^100243139 is an apocalyptic number.

100243139 is a deficient number, since it is larger than the sum of its proper divisors (1).

100243139 is an equidigital number, since it uses as much as digits as its factorization.

100243139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 100243139 is about 10012.1495693982. The cubic root of 100243139 is about 464.5347626451.

The spelling of 100243139 in words is "one hundred million, two hundred forty-three thousand, one hundred thirty-nine".