102899449 has 2 divisors, whose sum is σ = 102899450. Its totient is φ = 102899448.

The previous prime is 102899429. The next prime is 102899477. The reversal of 102899449 is 944998201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76685049 + 26214400 = 8757^2 + 5120^2 .

It is a cyclic number.

It is not a de Polignac number, because 102899449 - 2⁵ = 102899417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102899399 and 102899408.

It is not a weakly prime, because it can be changed into another prime (102899429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51449724 + 51449725.

It is an arithmetic number, because the mean of its divisors is an integer number (51449725).

Almost surely, 2^102899449 is an apocalyptic number.

It is an amenable number.

102899449 is a deficient number, since it is larger than the sum of its proper divisors (1).

102899449 is an equidigital number, since it uses as much as digits as its factorization.

102899449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 102899449 is about 10143.9365632874. The cubic root of 102899449 is about 468.6022286443.

The spelling of 102899449 in words is "one hundred two million, eight hundred ninety-nine thousand, four hundred forty-nine".