102909949 has 2 divisors, whose sum is σ = 102909950. Its totient is φ = 102909948.

The previous prime is 102909907. The next prime is 102909953. The reversal of 102909949 is 949909201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92987449 + 9922500 = 9643^2 + 3150^2 .

It is a cyclic number.

It is not a de Polignac number, because 102909949 - 2²¹ = 100812797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102909349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51454974 + 51454975.

It is an arithmetic number, because the mean of its divisors is an integer number (51454975).

Almost surely, 2^102909949 is an apocalyptic number.

It is an amenable number.

102909949 is a deficient number, since it is larger than the sum of its proper divisors (1).

102909949 is an equidigital number, since it uses as much as digits as its factorization.

102909949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 102909949 is about 10144.4541006404. The cubic root of 102909949 is about 468.6181670389.

The spelling of 102909949 in words is "one hundred two million, nine hundred nine thousand, nine hundred forty-nine".