102771439 has 4 divisors (see below), whose sum is σ = 103789080. Its totient is φ = 101753800.

The previous prime is 102771433. The next prime is 102771463. The reversal of 102771439 is 934177201.

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 102771439 - 2¹¹ = 102769391 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 (102771433) 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, 508669 + ... + 508870.

It is an arithmetic number, because the mean of its divisors is an integer number (25947270).

Almost surely, 2^102771439 is an apocalyptic number.

102771439 is a deficient number, since it is larger than the sum of its proper divisors (1017641).

102771439 is a wasteful number, since it uses less digits than its factorization.

102771439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017640.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 102771439 is about 10137.6249190824. The cubic root of 102771439 is about 468.4078296015.

The spelling of 102771439 in words is "one hundred two million, seven hundred seventy-one thousand, four hundred thirty-nine".