102123977 has 2 divisors, whose sum is σ = 102123978. Its totient is φ = 102123976.

The previous prime is 102123971. The next prime is 102124037. The reversal of 102123977 is 779321201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101687056 + 436921 = 10084^2 + 661^2 .

It is an emirp because it is prime and its reverse (779321201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102123977 - 2¹⁰ = 102122953 is a prime.

It is not a weakly prime, because it can be changed into another prime (102123971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51061988 + 51061989.

It is an arithmetic number, because the mean of its divisors is an integer number (51061989).

Almost surely, 2^102123977 is an apocalyptic number.

It is an amenable number.

102123977 is a deficient number, since it is larger than the sum of its proper divisors (1).

102123977 is an equidigital number, since it uses as much as digits as its factorization.

102123977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 102123977 is about 10105.6408505349. The cubic root of 102123977 is about 467.4220972693.

The spelling of 102123977 in words is "one hundred two million, one hundred twenty-three thousand, nine hundred seventy-seven".