102391129 has 2 divisors, whose sum is σ = 102391130. Its totient is φ = 102391128.

The previous prime is 102391103. The next prime is 102391139. The reversal of 102391129 is 921193201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69305625 + 33085504 = 8325^2 + 5752^2 .

It is a cyclic number.

It is not a de Polignac number, because 102391129 - 2⁵ = 102391097 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102391097 and 102391106.

It is not a weakly prime, because it can be changed into another prime (102391139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51195564 + 51195565.

It is an arithmetic number, because the mean of its divisors is an integer number (51195565).

Almost surely, 2^102391129 is an apocalyptic number.

It is an amenable number.

102391129 is a deficient number, since it is larger than the sum of its proper divisors (1).

102391129 is an equidigital number, since it uses as much as digits as its factorization.

102391129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 102391129 is about 10118.8501817153. The cubic root of 102391129 is about 467.8293278482.

The spelling of 102391129 in words is "one hundred two million, three hundred ninety-one thousand, one hundred twenty-nine".