620298421 has 4 divisors (see below), whose sum is σ = 621047500. Its totient is φ = 619549344.

The previous prime is 620298409. The next prime is 620298443. The reversal of 620298421 is 124892026.

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 496844100 + 123454321 = 22290^2 + 11111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620298421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620298401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373296 + ... + 374953.

It is an arithmetic number, because the mean of its divisors is an integer number (155261875).

Almost surely, 2^620298421 is an apocalyptic number.

It is an amenable number.

620298421 is a deficient number, since it is larger than the sum of its proper divisors (749079).

620298421 is an equidigital number, since it uses as much as digits as its factorization.

620298421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749078.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 620298421 is about 24905.7909129584. The cubic root of 620298421 is about 852.8386850688.

The spelling of 620298421 in words is "six hundred twenty million, two hundred ninety-eight thousand, four hundred twenty-one".