102123657877 has 2 divisors, whose sum is σ = 102123657878. Its totient is φ = 102123657876.

The previous prime is 102123657773. The next prime is 102123657899. The reversal of 102123657877 is 778756321201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89640958801 + 12482699076 = 299401^2 + 111726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102123657877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102123657877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102123657577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51061828938 + 51061828939.

It is an arithmetic number, because the mean of its divisors is an integer number (51061828939).

Almost surely, 2^102123657877 is an apocalyptic number.

It is an amenable number.

102123657877 is a deficient number, since it is larger than the sum of its proper divisors (1).

102123657877 is an equidigital number, since it uses as much as digits as its factorization.

102123657877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 49.

The spelling of 102123657877 in words is "one hundred two billion, one hundred twenty-three million, six hundred fifty-seven thousand, eight hundred seventy-seven".