620642353 has 4 divisors (see below), whose sum is σ = 653307760. Its totient is φ = 587976948.

The previous prime is 620642317. The next prime is 620642357. The reversal of 620642353 is 353246026.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620642353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620642357) 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, 16332675 + ... + 16332712.

It is an arithmetic number, because the mean of its divisors is an integer number (163326940).

Almost surely, 2^620642353 is an apocalyptic number.

It is an amenable number.

620642353 is a deficient number, since it is larger than the sum of its proper divisors (32665407).

620642353 is a wasteful number, since it uses less digits than its factorization.

620642353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32665406.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 620642353 is about 24912.6946153964. The cubic root of 620642353 is about 852.9962782046.

Adding to 620642353 its reverse (353246026), we get a palindrome (973888379).

The spelling of 620642353 in words is "six hundred twenty million, six hundred forty-two thousand, three hundred fifty-three".