123532730647 has 4 divisors (see below), whose sum is σ = 128903718960. Its totient is φ = 118161742336.

The previous prime is 123532730639. The next prime is 123532730669. The reversal of 123532730647 is 746037235321.

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 123532730647 - 2³ = 123532730639 is a prime.

It is a super-2 number, since 2×123532730647² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123532736647) 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, 2685494122 + ... + 2685494167.

It is an arithmetic number, because the mean of its divisors is an integer number (32225929740).

Almost surely, 2^123532730647 is an apocalyptic number.

123532730647 is a deficient number, since it is larger than the sum of its proper divisors (5370988313).

123532730647 is an equidigital number, since it uses as much as digits as its factorization.

123532730647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5370988312.

The product of its (nonzero) digits is 635040, while the sum is 43.

Adding to 123532730647 its reverse (746037235321), we get a palindrome (869569965968).

The spelling of 123532730647 in words is "one hundred twenty-three billion, five hundred thirty-two million, seven hundred thirty thousand, six hundred forty-seven".