123493491 has 80 divisors (see below), whose sum is σ = 220796928. Its totient is φ = 67910400.

The previous prime is 123493477. The next prime is 123493493. The reversal of 123493491 is 194394321.

123493491 is a `hidden beast` number, since 123 + 49 + 3 + 491 = 666.

It is not a de Polignac number, because 123493491 - 2⁶ = 123493427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123493493) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 469426 + ... + 469688.

Almost surely, 2^123493491 is an apocalyptic number.

123493491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123493491 is a deficient number, since it is larger than the sum of its proper divisors (97303437).

123493491 is a wasteful number, since it uses less digits than its factorization.

123493491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 325 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 123493491 is about 11112.7625278326. The cubic root of 123493491 is about 497.9831972847.

The spelling of 123493491 in words is "one hundred twenty-three million, four hundred ninety-three thousand, four hundred ninety-one".