102270709 has 4 divisors (see below), whose sum is σ = 103947340. Its totient is φ = 100594080.

The previous prime is 102270683. The next prime is 102270809. The reversal of 102270709 is 907072201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 907072201 = 7 ⋅129581743.

It can be written as a sum of positive squares in 2 ways, for example, as 20729809 + 81540900 = 4553^2 + 9030^2 .

It is a cyclic number.

It is not a de Polignac number, because 102270709 - 2⁹ = 102270197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102270809) 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 in 3 ways as a sum of consecutive naturals, for example, 838224 + ... + 838345.

It is an arithmetic number, because the mean of its divisors is an integer number (25986835).

Almost surely, 2^102270709 is an apocalyptic number.

It is an amenable number.

102270709 is a deficient number, since it is larger than the sum of its proper divisors (1676631).

102270709 is an equidigital number, since it uses as much as digits as its factorization.

102270709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676630.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 102270709 is about 10112.8981503820. The cubic root of 102270709 is about 467.6458545733.

The spelling of 102270709 in words is "one hundred two million, two hundred seventy thousand, seven hundred nine".