102949789 has 2 divisors, whose sum is σ = 102949790. Its totient is φ = 102949788.

The previous prime is 102949757. The next prime is 102949801. The reversal of 102949789 is 987949201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77528025 + 25421764 = 8805^2 + 5042^2 .

It is an emirp because it is prime and its reverse (987949201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102949789 - 2⁵ = 102949757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102949289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51474894 + 51474895.

It is an arithmetic number, because the mean of its divisors is an integer number (51474895).

Almost surely, 2^102949789 is an apocalyptic number.

It is an amenable number.

102949789 is a deficient number, since it is larger than the sum of its proper divisors (1).

102949789 is an equidigital number, since it uses as much as digits as its factorization.

102949789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 102949789 is about 10146.4175451240. The cubic root of 102949789 is about 468.6786320028.

The spelling of 102949789 in words is "one hundred two million, nine hundred forty-nine thousand, seven hundred eighty-nine".