1493917523 has 4 divisors (see below), whose sum is σ = 1707334320. Its totient is φ = 1280500728.

The previous prime is 1493917489. The next prime is 1493917543. The reversal of 1493917523 is 3257193941.

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 1493917523 - 2¹² = 1493913427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1493917543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106708388 + ... + 106708401.

It is an arithmetic number, because the mean of its divisors is an integer number (426833580).

Almost surely, 2^1493917523 is an apocalyptic number.

1493917523 is a deficient number, since it is larger than the sum of its proper divisors (213416797).

1493917523 is an equidigital number, since it uses as much as digits as its factorization.

1493917523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213416796.

The product of its digits is 204120, while the sum is 44.

The square root of 1493917523 is about 38651.2292560017. The cubic root of 1493917523 is about 1143.1648802151.

The spelling of 1493917523 in words is "one billion, four hundred ninety-three million, nine hundred seventeen thousand, five hundred twenty-three".