613986481 has 4 divisors (see below), whose sum is σ = 616082292. Its totient is φ = 611890672.

The previous prime is 613986431. The next prime is 613986493. The reversal of 613986481 is 184689316.

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 511166881 + 102819600 = 22609^2 + 10140^2 .

It is a cyclic number.

It is not a de Polignac number, because 613986481 - 2⁷ = 613986353 is a prime.

It is a super-2 number, since 2×613986481² = 753958797701526722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613986421) 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, 1047466 + ... + 1048051.

It is an arithmetic number, because the mean of its divisors is an integer number (154020573).

Almost surely, 2^613986481 is an apocalyptic number.

It is an amenable number.

613986481 is a deficient number, since it is larger than the sum of its proper divisors (2095811).

613986481 is a wasteful number, since it uses less digits than its factorization.

613986481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095810.

The product of its digits is 248832, while the sum is 46.

The square root of 613986481 is about 24778.7505940070. The cubic root of 613986481 is about 849.9360879281.

The spelling of 613986481 in words is "six hundred thirteen million, nine hundred eighty-six thousand, four hundred eighty-one".