493490651 has 4 divisors (see below), whose sum is σ = 510507600. Its totient is φ = 476473704.

The previous prime is 493490623. The next prime is 493490659. The reversal of 493490651 is 156094394.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156094394 = 2 ⋅78047197.

It is a cyclic number.

It is not a de Polignac number, because 493490651 - 2²² = 489296347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 493490599 and 493490608.

It is not an unprimeable number, because it can be changed into a prime (493490659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8508431 + ... + 8508488.

It is an arithmetic number, because the mean of its divisors is an integer number (127626900).

Almost surely, 2^493490651 is an apocalyptic number.

493490651 is a deficient number, since it is larger than the sum of its proper divisors (17016949).

493490651 is a wasteful number, since it uses less digits than its factorization.

493490651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17016948.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 493490651 is about 22214.6494683126. The cubic root of 493490651 is about 790.2411542796.

The spelling of 493490651 in words is "four hundred ninety-three million, four hundred ninety thousand, six hundred fifty-one".