123974968491 has 24 divisors (see below), whose sum is σ = 195489171696. Its totient is φ = 75084546240.

The previous prime is 123974968487. The next prime is 123974968499. The reversal of 123974968491 is 194869479321.

123974968491 is a `hidden beast` number, since 12 + 3 + 9 + 74 + 9 + 68 + 491 = 666.

It is not a de Polignac number, because 123974968491 - 2² = 123974968487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123974968499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 287080 + ... + 574773.

It is an arithmetic number, because the mean of its divisors is an integer number (8145382154).

Almost surely, 2^123974968491 is an apocalyptic number.

123974968491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123974968491 is a deficient number, since it is larger than the sum of its proper divisors (71514203205).

123974968491 is a wasteful number, since it uses less digits than its factorization.

123974968491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863323 (or 863320 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 123974968491 in words is "one hundred twenty-three billion, nine hundred seventy-four million, nine hundred sixty-eight thousand, four hundred ninety-one".