102131789 has 2 divisors, whose sum is σ = 102131790. Its totient is φ = 102131788.

The previous prime is 102131759. The next prime is 102131819. The reversal of 102131789 is 987131201.

It is a balanced prime because it is at equal distance from previous prime (102131759) and next prime (102131819).

It can be written as a sum of positive squares in only one way, i.e., 83356900 + 18774889 = 9130^2 + 4333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102131789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102131759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51065894 + 51065895.

It is an arithmetic number, because the mean of its divisors is an integer number (51065895).

Almost surely, 2^102131789 is an apocalyptic number.

It is an amenable number.

102131789 is a deficient number, since it is larger than the sum of its proper divisors (1).

102131789 is an equidigital number, since it uses as much as digits as its factorization.

102131789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 102131789 is about 10106.0273599471. The cubic root of 102131789 is about 467.4340154901.

The spelling of 102131789 in words is "one hundred two million, one hundred thirty-one thousand, seven hundred eighty-nine".