485113781 has 4 divisors (see below), whose sum is σ = 490115052. Its totient is φ = 480112512.

The previous prime is 485113777. The next prime is 485113787. The reversal of 485113781 is 187311584.

It is a happy number.

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 384512881 + 100600900 = 19609^2 + 10030^2 .

It is a cyclic number.

It is not a de Polignac number, because 485113781 - 2² = 485113777 is a prime.

It is a super-2 number, since 2×485113781² = 470670761032231922, which contains 22 as substring.

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 (485113787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2500490 + ... + 2500683.

It is an arithmetic number, because the mean of its divisors is an integer number (122528763).

Almost surely, 2^485113781 is an apocalyptic number.

It is an amenable number.

485113781 is a deficient number, since it is larger than the sum of its proper divisors (5001271).

485113781 is an equidigital number, since it uses as much as digits as its factorization.

485113781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001270.

The product of its digits is 26880, while the sum is 38.

The square root of 485113781 is about 22025.2986585880. The cubic root of 485113781 is about 785.7442363758.

The spelling of 485113781 in words is "four hundred eighty-five million, one hundred thirteen thousand, seven hundred eighty-one".