247896081 has 6 divisors (see below), whose sum is σ = 358072130. Its totient is φ = 165264048.

The previous prime is 247896071. The next prime is 247896107. The reversal of 247896081 is 180698742.

It can be written as a sum of positive squares in only one way, i.e., 192765456 + 55130625 = 13884^2 + 7425^2 .

It is not a de Polignac number, because 247896081 - 2⁷ = 247895953 is a prime.

It is a super-2 number, since 2×247896081² = 122904933950317122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247896071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13771996 + ... + 13772013.

Almost surely, 2^247896081 is an apocalyptic number.

It is an amenable number.

247896081 is a deficient number, since it is larger than the sum of its proper divisors (110176049).

247896081 is a wasteful number, since it uses less digits than its factorization.

247896081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27544015 (or 27544012 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 247896081 is about 15744.7159707630. The cubic root of 247896081 is about 628.1883630740.

The spelling of 247896081 in words is "two hundred forty-seven million, eight hundred ninety-six thousand, eighty-one".