620554379 has 2 divisors, whose sum is σ = 620554380. Its totient is φ = 620554378.

The previous prime is 620554367. The next prime is 620554381. The reversal of 620554379 is 973455026.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620554379 is a prime.

Together with 620554381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620554399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310277189 + 310277190.

It is an arithmetic number, because the mean of its divisors is an integer number (310277190).

Almost surely, 2^620554379 is an apocalyptic number.

620554379 is a deficient number, since it is larger than the sum of its proper divisors (1).

620554379 is an equidigital number, since it uses as much as digits as its factorization.

620554379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 620554379 is about 24910.9289068071. The cubic root of 620554379 is about 852.9559731668.

The spelling of 620554379 in words is "six hundred twenty million, five hundred fifty-four thousand, three hundred seventy-nine".