102750379209 has 27 divisors (see below), whose sum is σ = 151058808589. Its totient is φ = 67302048120.

The previous prime is 102750379181. The next prime is 102750379219. The reversal of 102750379209 is 902973057201.

The square root of 102750379209 is 320547.

It is a perfect power (a square), and thus also a powerful number.

102750379209 is a `hidden beast` number, since 1 + 0 + 2 + 75 + 0 + 379 + 209 = 666.

It is not a de Polignac number, because 102750379209 - 2¹⁷ = 102750248137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102750379219) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 56735914 + ... + 56737724.

Almost surely, 2^102750379209 is an apocalyptic number.

102750379209 is the 320547-th square number.

102750379209 is the 160274-th centered octagonal number.

It is an amenable number.

102750379209 is a deficient number, since it is larger than the sum of its proper divisors (48308429380).

102750379209 is an frugal number, since it uses more digits than its factorization.

102750379209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746 (or 1873 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The spelling of 102750379209 in words is "one hundred two billion, seven hundred fifty million, three hundred seventy-nine thousand, two hundred nine".