123038891361 has 9 divisors (see below), whose sum is σ = 177724363089. Its totient is φ = 82025226036.

The previous prime is 123038891347. The next prime is 123038891369. The reversal of 123038891361 is 163198830321.

The square root of 123038891361 is 350769.

It is a perfect power (a square), and thus also a powerful number.

123038891361 is a `hidden beast` number, since 1 + 230 + 388 + 9 + 1 + 36 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 123038891361 - 2¹⁷ = 123038760289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123038891369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 993846 + ... + 1110768.

Almost surely, 2^123038891361 is an apocalyptic number.

123038891361 is the 350769-th square number.

123038891361 is the 175385-th centered octagonal number.

It is an amenable number.

123038891361 is a deficient number, since it is larger than the sum of its proper divisors (54685471728).

123038891361 is an frugal number, since it uses more digits than its factorization.

123038891361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233852 (or 116926 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 123038891361 in words is "one hundred twenty-three billion, thirty-eight million, eight hundred ninety-one thousand, three hundred sixty-one".