494557751 has 4 divisors (see below), whose sum is σ = 494629512. Its totient is φ = 494485992.

The previous prime is 494557729. The next prime is 494557757. The reversal of 494557751 is 157755494.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-494557751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 494557696 and 494557705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494557757) 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, 24296 + ... + 39741.

It is an arithmetic number, because the mean of its divisors is an integer number (123657378).

Almost surely, 2^494557751 is an apocalyptic number.

494557751 is a deficient number, since it is larger than the sum of its proper divisors (71761).

494557751 is an equidigital number, since it uses as much as digits as its factorization.

494557751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71760.

The product of its digits is 882000, while the sum is 47.

The square root of 494557751 is about 22238.6544332161. The cubic root of 494557751 is about 790.8103371341.

The spelling of 494557751 in words is "four hundred ninety-four million, five hundred fifty-seven thousand, seven hundred fifty-one".