247243639696 has 15 divisors (see below), whose sum is σ = 479038405521. Its totient is φ = 123620825376.

The previous prime is 247243639673. The next prime is 247243639697. The reversal of 247243639696 is 696936342742.

The square root of 247243639696 is 497236.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 43445566096 + 203798073600 = 208436^2 + 451440^2 .

It is a super-2 number, since 2×247243639696² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247243639697) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1926790 + ... + 2051098.

Almost surely, 2^247243639696 is an apocalyptic number.

247243639696 is the 497236-th square number.

It is an amenable number.

247243639696 is a deficient number, since it is larger than the sum of its proper divisors (231794765825).

247243639696 is an frugal number, since it uses more digits than its factorization.

247243639696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248626 (or 124311 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 61.

The spelling of 247243639696 in words is "two hundred forty-seven billion, two hundred forty-three million, six hundred thirty-nine thousand, six hundred ninety-six".