102649949 has 2 divisors, whose sum is σ = 102649950. Its totient is φ = 102649948.

The previous prime is 102649919. The next prime is 102649979. The reversal of 102649949 is 949946201.

It is a balanced prime because it is at equal distance from previous prime (102649919) and next prime (102649979).

It can be written as a sum of positive squares in only one way, i.e., 86304100 + 16345849 = 9290^2 + 4043^2 .

It is a cyclic number.

It is not a de Polignac number, because 102649949 - 2¹² = 102645853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102649919) 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, 51324974 + 51324975.

It is an arithmetic number, because the mean of its divisors is an integer number (51324975).

Almost surely, 2^102649949 is an apocalyptic number.

It is an amenable number.

102649949 is a deficient number, since it is larger than the sum of its proper divisors (1).

102649949 is an equidigital number, since it uses as much as digits as its factorization.

102649949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 102649949 is about 10131.6311125110. The cubic root of 102649949 is about 468.2231826268.

The spelling of 102649949 in words is "one hundred two million, six hundred forty-nine thousand, nine hundred forty-nine".