102783139 has 6 divisors (see below), whose sum is σ = 109185164. Its totient is φ = 96736800.

The previous prime is 102783137. The next prime is 102783157. The reversal of 102783139 is 931387201.

It is not a de Polignac number, because 102783139 - 2¹ = 102783137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102783137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 177537 + ... + 178114.

Almost surely, 2^102783139 is an apocalyptic number.

102783139 is a deficient number, since it is larger than the sum of its proper divisors (6402025).

102783139 is an equidigital number, since it uses as much as digits as its factorization.

102783139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355685 (or 355668 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 102783139 is about 10138.2019609002. The cubic root of 102783139 is about 468.4256042014.

The spelling of 102783139 in words is "one hundred two million, seven hundred eighty-three thousand, one hundred thirty-nine".