620045771 has 2 divisors, whose sum is σ = 620045772. Its totient is φ = 620045770.

The previous prime is 620045711. The next prime is 620045813. The reversal of 620045771 is 177540026.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620045771 is a prime.

It is not a weakly prime, because it can be changed into another prime (620045711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310022885 + 310022886.

It is an arithmetic number, because the mean of its divisors is an integer number (310022886).

Almost surely, 2^620045771 is an apocalyptic number.

620045771 is a deficient number, since it is larger than the sum of its proper divisors (1).

620045771 is an equidigital number, since it uses as much as digits as its factorization.

620045771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 620045771 is about 24900.7182828126. The cubic root of 620045771 is about 852.7228811551.

Adding to 620045771 its reverse (177540026), we get a palindrome (797585797).

The spelling of 620045771 in words is "six hundred twenty million, forty-five thousand, seven hundred seventy-one".