620733481 has 4 divisors (see below), whose sum is σ = 635873364. Its totient is φ = 605593600.

The previous prime is 620733479. The next prime is 620733523. The reversal of 620733481 is 184337026.

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 127893481 + 492840000 = 11309^2 + 22200^2 .

It is a cyclic number.

It is not a de Polignac number, because 620733481 - 2¹ = 620733479 is a prime.

It is a super-2 number, since 2×620733481² = 770620108868754722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620736481) 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, 7569880 + ... + 7569961.

It is an arithmetic number, because the mean of its divisors is an integer number (158968341).

Almost surely, 2^620733481 is an apocalyptic number.

It is an amenable number.

620733481 is a deficient number, since it is larger than the sum of its proper divisors (15139883).

620733481 is a wasteful number, since it uses less digits than its factorization.

620733481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15139882.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 620733481 is about 24914.5234953430. The cubic root of 620733481 is about 853.0380242227.

The spelling of 620733481 in words is "six hundred twenty million, seven hundred thirty-three thousand, four hundred eighty-one".