247689097 has 8 divisors (see below), whose sum is σ = 252195912. Its totient is φ = 243196800.

The previous prime is 247689089. The next prime is 247689121. The reversal of 247689097 is 790986742.

It can be written as a sum of positive squares in 4 ways, for example, as 29713401 + 217975696 = 5451^2 + 14764^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 247689097 - 2³ = 247689089 is a prime.

It is a super-2 number, since 2×247689097² = 122699777545350818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247689037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34347 + ... + 40927.

It is an arithmetic number, because the mean of its divisors is an integer number (31524489).

Almost surely, 2^247689097 is an apocalyptic number.

It is an amenable number.

247689097 is a deficient number, since it is larger than the sum of its proper divisors (4506815).

247689097 is an equidigital number, since it uses as much as digits as its factorization.

247689097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7259.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 247689097 is about 15738.1414722324. The cubic root of 247689097 is about 628.0134764239.

The spelling of 247689097 in words is "two hundred forty-seven million, six hundred eighty-nine thousand, ninety-seven".