102808157 has 2 divisors, whose sum is σ = 102808158. Its totient is φ = 102808156.

The previous prime is 102808117. The next prime is 102808169. The reversal of 102808157 is 751808201.

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., 102799321 + 8836 = 10139^2 + 94^2 .

It is an emirp because it is prime and its reverse (751808201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102808157 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 (102808117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51404078 + 51404079.

It is an arithmetic number, because the mean of its divisors is an integer number (51404079).

Almost surely, 2^102808157 is an apocalyptic number.

It is an amenable number.

102808157 is a deficient number, since it is larger than the sum of its proper divisors (1).

102808157 is an equidigital number, since it uses as much as digits as its factorization.

102808157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 102808157 is about 10139.4357338069. The cubic root of 102808157 is about 468.4636069360.

The spelling of 102808157 in words is "one hundred two million, eight hundred eight thousand, one hundred fifty-seven".