706478491 has 4 divisors (see below), whose sum is σ = 710978512. Its totient is φ = 701978472.

The previous prime is 706478477. The next prime is 706478497. The reversal of 706478491 is 194874607.

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 706478491 - 2⁹ = 706477979 is a prime.

It is a super-2 number, since 2×706478491² = 998223716491274162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (706478497) 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, 2249775 + ... + 2250088.

It is an arithmetic number, because the mean of its divisors is an integer number (177744628).

Almost surely, 2^706478491 is an apocalyptic number.

706478491 is a deficient number, since it is larger than the sum of its proper divisors (4500021).

706478491 is a wasteful number, since it uses less digits than its factorization.

706478491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4500020.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 706478491 is about 26579.6631092269. The cubic root of 706478491 is about 890.6347746066.

The spelling of 706478491 in words is "seven hundred six million, four hundred seventy-eight thousand, four hundred ninety-one".