620422641 has 6 divisors (see below), whose sum is σ = 896166050. Its totient is φ = 413615088.

The previous prime is 620422639. The next prime is 620422651. The reversal of 620422641 is 146224026.

It can be written as a sum of positive squares in only one way, i.e., 353590416 + 266832225 = 18804^2 + 16335^2 .

It is not a de Polignac number, because 620422641 - 2¹ = 620422639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620422651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34467916 + ... + 34467933.

Almost surely, 2^620422641 is an apocalyptic number.

It is an amenable number.

620422641 is a deficient number, since it is larger than the sum of its proper divisors (275743409).

620422641 is a wasteful number, since it uses less digits than its factorization.

620422641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68935855 (or 68935852 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 620422641 is about 24908.2845856554. The cubic root of 620422641 is about 852.8956106532.

Adding to 620422641 its reverse (146224026), we get a palindrome (766646667).

The spelling of 620422641 in words is "six hundred twenty million, four hundred twenty-two thousand, six hundred forty-one".