102997649 has 2 divisors, whose sum is σ = 102997650. Its totient is φ = 102997648.

The previous prime is 102997639. The next prime is 102997663. The reversal of 102997649 is 946799201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85692049 + 17305600 = 9257^2 + 4160^2 .

It is an emirp because it is prime and its reverse (946799201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102997649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102997619) 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, 51498824 + 51498825.

It is an arithmetic number, because the mean of its divisors is an integer number (51498825).

Almost surely, 2^102997649 is an apocalyptic number.

It is an amenable number.

102997649 is a deficient number, since it is larger than the sum of its proper divisors (1).

102997649 is an equidigital number, since it uses as much as digits as its factorization.

102997649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 102997649 is about 10148.7757389746. The cubic root of 102997649 is about 468.7512482574.

The spelling of 102997649 in words is "one hundred two million, nine hundred ninety-seven thousand, six hundred forty-nine".