620504447 has 2 divisors, whose sum is σ = 620504448. Its totient is φ = 620504446.

The previous prime is 620504399. The next prime is 620504461. The reversal of 620504447 is 744405026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620504447 - 2¹² = 620500351 is a prime.

It is equal to p_32338319 and since 620504447 and 32338319 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620504477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310252223 + 310252224.

It is an arithmetic number, because the mean of its divisors is an integer number (310252224).

Almost surely, 2^620504447 is an apocalyptic number.

620504447 is a deficient number, since it is larger than the sum of its proper divisors (1).

620504447 is an equidigital number, since it uses as much as digits as its factorization.

620504447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 620504447 is about 24909.9266759258. The cubic root of 620504447 is about 852.9330952685.

The spelling of 620504447 in words is "six hundred twenty million, five hundred four thousand, four hundred forty-seven".