248838661 has 4 divisors (see below), whose sum is σ = 248874732. Its totient is φ = 248802592.

The previous prime is 248838617. The next prime is 248838757. The reversal of 248838661 is 166838842.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26977636 + 221861025 = 5194^2 + 14895^2 .

It is a cyclic number.

It is not a de Polignac number, because 248838661 - 2⁷ = 248838533 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 (248838361) 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, 4096 + ... + 22681.

It is an arithmetic number, because the mean of its divisors is an integer number (62218683).

Almost surely, 2^248838661 is an apocalyptic number.

It is an amenable number.

248838661 is a deficient number, since it is larger than the sum of its proper divisors (36071).

248838661 is an equidigital number, since it uses as much as digits as its factorization.

248838661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36070.

The product of its digits is 442368, while the sum is 46.

The square root of 248838661 is about 15774.6207878351. The cubic root of 248838661 is about 628.9835469438.

The spelling of 248838661 in words is "two hundred forty-eight million, eight hundred thirty-eight thousand, six hundred sixty-one".