248913391 has 4 divisors (see below), whose sum is σ = 249082272. Its totient is φ = 248744512.

The previous prime is 248913377. The next prime is 248913403. The reversal of 248913391 is 193319842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193319842 = 2 ⋅96659921.

It is a cyclic number.

It is not a de Polignac number, because 248913391 - 2⁵ = 248913359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248913311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82210 + ... + 85183.

It is an arithmetic number, because the mean of its divisors is an integer number (62270568).

Almost surely, 2^248913391 is an apocalyptic number.

248913391 is a deficient number, since it is larger than the sum of its proper divisors (168881).

248913391 is a wasteful number, since it uses less digits than its factorization.

248913391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168880.

The product of its digits is 46656, while the sum is 40.

The square root of 248913391 is about 15776.9892882007. The cubic root of 248913391 is about 629.0465050545.

It can be divided in two parts, 24891 and 3391, that added together give a palindrome (28282).

The spelling of 248913391 in words is "two hundred forty-eight million, nine hundred thirteen thousand, three hundred ninety-one".