102785311 has 4 divisors (see below), whose sum is σ = 103024224. Its totient is φ = 102546400.

The previous prime is 102785273. The next prime is 102785339. The reversal of 102785311 is 113587201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102785311 - 2¹⁵ = 102752543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102785311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102785411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118810 + ... + 119671.

It is an arithmetic number, because the mean of its divisors is an integer number (25756056).

Almost surely, 2^102785311 is an apocalyptic number.

102785311 is a deficient number, since it is larger than the sum of its proper divisors (238913).

102785311 is an equidigital number, since it uses as much as digits as its factorization.

102785311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238912.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 102785311 is about 10138.3090799206. The cubic root of 102785311 is about 468.4289037479.

The spelling of 102785311 in words is "one hundred two million, seven hundred eighty-five thousand, three hundred eleven".