248691909 has 8 divisors (see below), whose sum is σ = 332197600. Its totient is φ = 165490416.

The previous prime is 248691881. The next prime is 248691917. The reversal of 248691909 is 909196842.

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

It is not a de Polignac number, because 248691909 - 2¹⁶ = 248626373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248691109) 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, 74134 + ... + 77415.

It is an arithmetic number, because the mean of its divisors is an integer number (41524700).

Almost surely, 2^248691909 is an apocalyptic number.

It is an amenable number.

248691909 is a deficient number, since it is larger than the sum of its proper divisors (83505691).

248691909 is a wasteful number, since it uses less digits than its factorization.

248691909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152099.

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 248691909 is about 15769.9685795502. The cubic root of 248691909 is about 628.8598754525.

It can be divided in two parts, 2486 and 91909, that added together give a triangular number (94395 = T₄₃₄).

The spelling of 248691909 in words is "two hundred forty-eight million, six hundred ninety-one thousand, nine hundred nine".