248765779 has 4 divisors (see below), whose sum is σ = 249806880. Its totient is φ = 247724680.

The previous prime is 248765767. The next prime is 248765801. The reversal of 248765779 is 977567842.

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

It is a cyclic number.

It is not a de Polignac number, because 248765779 - 2¹⁹ = 248241491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (248765719) 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, 520192 + ... + 520669.

It is an arithmetic number, because the mean of its divisors is an integer number (62451720).

Almost surely, 2^248765779 is an apocalyptic number.

248765779 is a deficient number, since it is larger than the sum of its proper divisors (1041101).

248765779 is a wasteful number, since it uses less digits than its factorization.

248765779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041100.

The product of its digits is 5927040, while the sum is 55.

The square root of 248765779 is about 15772.3105155839. The cubic root of 248765779 is about 628.9221335834.

The spelling of 248765779 in words is "two hundred forty-eight million, seven hundred sixty-five thousand, seven hundred seventy-nine".