102129943 has 2 divisors, whose sum is σ = 102129944. Its totient is φ = 102129942.

The previous prime is 102129899. The next prime is 102129947. The reversal of 102129943 is 349921201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102129943 - 2²¹ = 100032791 is a prime.

It is equal to p_5877013 and since 102129943 and 5877013 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102129947) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51064971 + 51064972.

It is an arithmetic number, because the mean of its divisors is an integer number (51064972).

Almost surely, 2^102129943 is an apocalyptic number.

102129943 is a deficient number, since it is larger than the sum of its proper divisors (1).

102129943 is an equidigital number, since it uses as much as digits as its factorization.

102129943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 102129943 is about 10105.9360278996. The cubic root of 102129943 is about 467.4311992321.

The spelling of 102129943 in words is "one hundred two million, one hundred twenty-nine thousand, nine hundred forty-three".