247432961 has 6 divisors (see below), whose sum is σ = 251701362. Its totient is φ = 243235760.

The previous prime is 247432921. The next prime is 247432967. The reversal of 247432961 is 169234742.

It can be written as a sum of positive squares in only one way, i.e., 235315600 + 12117361 = 15340^2 + 3481^2 .

It is not a de Polignac number, because 247432961 - 2¹⁴ = 247416577 is a prime.

It is a super-2 number, since 2×247432961² = 122446140378455042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247432967) 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, 32060 + ... + 39021.

It is an arithmetic number, because the mean of its divisors is an integer number (41950227).

Almost surely, 2^247432961 is an apocalyptic number.

It is an amenable number.

247432961 is a deficient number, since it is larger than the sum of its proper divisors (4268401).

247432961 is an frugal number, since it uses more digits than its factorization.

247432961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71199 (or 71140 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 247432961 is about 15730.0019389700. The cubic root of 247432961 is about 627.7969249202.

The spelling of 247432961 in words is "two hundred forty-seven million, four hundred thirty-two thousand, nine hundred sixty-one".