248391397 has 6 divisors (see below), whose sum is σ = 255203174. Its totient is φ = 241584840.

The previous prime is 248391383. The next prime is 248391419. The reversal of 248391397 is 793193842.

It can be written as a sum of positive squares in only one way, i.e., 241678116 + 6713281 = 15546^2 + 2591^2 .

It is a de Polignac number, because none of the positive numbers 2^k-248391397 is a prime.

It is a super-3 number, since 3×248391397³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248391307) 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, 94572 + ... + 97162.

Almost surely, 2^248391397 is an apocalyptic number.

It is an amenable number.

248391397 is a deficient number, since it is larger than the sum of its proper divisors (6811777).

248391397 is an frugal number, since it uses more digits than its factorization.

248391397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5219 (or 2628 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 248391397 is about 15760.4377160027. The cubic root of 248391397 is about 628.6064747554.

The spelling of 248391397 in words is "two hundred forty-eight million, three hundred ninety-one thousand, three hundred ninety-seven".