102818641 has 2 divisors, whose sum is σ = 102818642. Its totient is φ = 102818640.

The previous prime is 102818609. The next prime is 102818647. The reversal of 102818641 is 146818201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84713616 + 18105025 = 9204^2 + 4255^2 .

It is a cyclic number.

It is not a de Polignac number, because 102818641 - 2⁵ = 102818609 is a prime.

It is not a weakly prime, because it can be changed into another prime (102818647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51409320 + 51409321.

It is an arithmetic number, because the mean of its divisors is an integer number (51409321).

Almost surely, 2^102818641 is an apocalyptic number.

It is an amenable number.

102818641 is a deficient number, since it is larger than the sum of its proper divisors (1).

102818641 is an equidigital number, since it uses as much as digits as its factorization.

102818641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 102818641 is about 10139.9527119213. The cubic root of 102818641 is about 468.4795304635.

The spelling of 102818641 in words is "one hundred two million, eight hundred eighteen thousand, six hundred forty-one".