247332397 has 8 divisors (see below), whose sum is σ = 271384344. Its totient is φ = 223998528.

The previous prime is 247332359. The next prime is 247332403. The reversal of 247332397 is 793233742.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 88849476 + 158482921 = 9426^2 + 12589^2 .

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

It is not a de Polignac number, because 247332397 - 2²⁷ = 113114669 is a prime.

It is a super-2 number, since 2×247332397² = 122346629211531218, 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 (247332347) 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, 178798 + ... + 180175.

It is an arithmetic number, because the mean of its divisors is an integer number (33923043).

Almost surely, 2^247332397 is an apocalyptic number.

It is an amenable number.

247332397 is a deficient number, since it is larger than the sum of its proper divisors (24051947).

247332397 is a wasteful number, since it uses less digits than its factorization.

247332397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359039.

The product of its digits is 190512, while the sum is 40.

The square root of 247332397 is about 15726.8050474341. The cubic root of 247332397 is about 627.7118617112.

The spelling of 247332397 in words is "two hundred forty-seven million, three hundred thirty-two thousand, three hundred ninety-seven".