620049953 has 2 divisors, whose sum is σ = 620049954. Its totient is φ = 620049952.

The previous prime is 620049943. The next prime is 620049973. The reversal of 620049953 is 359940026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397085329 + 222964624 = 19927^2 + 14932^2 .

It is a cyclic number.

It is not a de Polignac number, because 620049953 - 2⁸ = 620049697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (620049943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310024976 + 310024977.

It is an arithmetic number, because the mean of its divisors is an integer number (310024977).

Almost surely, 2^620049953 is an apocalyptic number.

It is an amenable number.

620049953 is a deficient number, since it is larger than the sum of its proper divisors (1).

620049953 is an equidigital number, since it uses as much as digits as its factorization.

620049953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 620049953 is about 24900.8022561523. The cubic root of 620049953 is about 852.7247982604.

Adding to 620049953 its reverse (359940026), we get a palindrome (979989979).

The spelling of 620049953 in words is "six hundred twenty million, forty-nine thousand, nine hundred fifty-three".