123351520447 has 8 divisors (see below), whose sum is σ = 130628836512. Its totient is φ = 116076576000.

The previous prime is 123351520433. The next prime is 123351520469. The reversal of 123351520447 is 744025153321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123351520447 - 2³¹ = 121204036799 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 (123351520427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485254 + ... + 694387.

It is an arithmetic number, because the mean of its divisors is an integer number (16328604564).

Almost surely, 2^123351520447 is an apocalyptic number.

123351520447 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

123351520447 is a deficient number, since it is larger than the sum of its proper divisors (7277316065).

123351520447 is a wasteful number, since it uses less digits than its factorization.

123351520447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185809.

The product of its (nonzero) digits is 100800, while the sum is 37.

Adding to 123351520447 its reverse (744025153321), we get a palindrome (867376673768).

The spelling of 123351520447 in words is "one hundred twenty-three billion, three hundred fifty-one million, five hundred twenty thousand, four hundred forty-seven".