5279781 has 16 divisors (see below), whose sum is σ = 7622720. Its totient is φ = 3231360.

The previous prime is 5279767. The next prime is 5279783. The reversal of 5279781 is 1879725.

It is not a de Polignac number, because 5279781 - 2¹⁸ = 5017637 is a prime.

It is a super-2 number, since 2×5279781² = 55752174815922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5279783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12705 + ... + 13113.

It is an arithmetic number, because the mean of its divisors is an integer number (476420).

Almost surely, 2^5279781 is an apocalyptic number.

It is an amenable number.

5279781 is a deficient number, since it is larger than the sum of its proper divisors (2342939).

5279781 is a wasteful number, since it uses less digits than its factorization.

5279781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756.

The product of its digits is 35280, while the sum is 39.

The square root of 5279781 is about 2297.7774043627. Note that the first 3 decimals coincide. The cubic root of 5279781 is about 174.1293462868.

The spelling of 5279781 in words is "five million, two hundred seventy-nine thousand, seven hundred eighty-one".