248691397 has 4 divisors (see below), whose sum is σ = 249023296. Its totient is φ = 248359500.

The previous prime is 248691389. The next prime is 248691407. The reversal of 248691397 is 793196842.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 248691397 - 2³ = 248691389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 248691397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248691367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164823 + ... + 166324.

It is an arithmetic number, because the mean of its divisors is an integer number (62255824).

Almost surely, 2^248691397 is an apocalyptic number.

It is an amenable number.

248691397 is a deficient number, since it is larger than the sum of its proper divisors (331899).

248691397 is an equidigital number, since it uses as much as digits as its factorization.

248691397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331898.

The product of its digits is 653184, while the sum is 49.

The square root of 248691397 is about 15769.9523461550. The cubic root of 248691397 is about 628.8594438925.

Subtracting 248691397 from its reverse (793196842), we obtain a palindrome (544505445).

The spelling of 248691397 in words is "two hundred forty-eight million, six hundred ninety-one thousand, three hundred ninety-seven".