281703138607 has 4 divisors (see below), whose sum is σ = 307312514856. Its totient is φ = 256093762360.

The previous prime is 281703138557. The next prime is 281703138611. The reversal of 281703138607 is 706831307182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281703138607 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 (281703138667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12804688108 + ... + 12804688129.

It is an arithmetic number, because the mean of its divisors is an integer number (76828128714).

Almost surely, 2^281703138607 is an apocalyptic number.

281703138607 is a deficient number, since it is larger than the sum of its proper divisors (25609376249).

281703138607 is a wasteful number, since it uses less digits than its factorization.

281703138607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25609376248.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 281703138607 in words is "two hundred eighty-one billion, seven hundred three million, one hundred thirty-eight thousand, six hundred seven".