102784405431 has 16 divisors (see below), whose sum is σ = 144271366400. Its totient is φ = 64910818368.

The previous prime is 102784405363. The next prime is 102784405463. The reversal of 102784405431 is 134504487201.

It is a de Polignac number, because none of the positive numbers 2^k-102784405431 is a prime.

It is a super-2 number, since 2×102784405431² (a number of 23 digits) contains 22 as substring.

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 102784405431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102784405931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639555 + ... + 783963.

It is an arithmetic number, because the mean of its divisors is an integer number (9016960400).

Almost surely, 2^102784405431 is an apocalyptic number.

102784405431 is a deficient number, since it is larger than the sum of its proper divisors (41486960969).

102784405431 is a wasteful number, since it uses less digits than its factorization.

102784405431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156918.

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 102784405431 in words is "one hundred two billion, seven hundred eighty-four million, four hundred five thousand, four hundred thirty-one".