249428021713 has 8 divisors (see below), whose sum is σ = 268676788968. Its totient is φ = 230188111104.

The previous prime is 249428021701. The next prime is 249428021719. The reversal of 249428021713 is 317120824942.

It can be written as a sum of positive squares in 4 ways, for example, as 300259584 + 249127762129 = 17328^2 + 499127^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249428021713 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 249428021713.

It is not an unprimeable number, because it can be changed into a prime (249428021719) 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, 2155606 + ... + 2268367.

It is an arithmetic number, because the mean of its divisors is an integer number (33584598621).

Almost surely, 2^249428021713 is an apocalyptic number.

It is an amenable number.

249428021713 is a deficient number, since it is larger than the sum of its proper divisors (19248767255).

249428021713 is a wasteful number, since it uses less digits than its factorization.

249428021713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428323.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 249428021713 in words is "two hundred forty-nine billion, four hundred twenty-eight million, twenty-one thousand, seven hundred thirteen".