620478773 has 2 divisors, whose sum is σ = 620478774. Its totient is φ = 620478772.

The previous prime is 620478743. The next prime is 620478779. The reversal of 620478773 is 377874026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377835844 + 242642929 = 19438^2 + 15577^2 .

It is a cyclic number.

It is not a de Polignac number, because 620478773 - 2¹⁶ = 620413237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620478779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310239386 + 310239387.

It is an arithmetic number, because the mean of its divisors is an integer number (310239387).

Almost surely, 2^620478773 is an apocalyptic number.

It is an amenable number.

620478773 is a deficient number, since it is larger than the sum of its proper divisors (1).

620478773 is an equidigital number, since it uses as much as digits as its factorization.

620478773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 44.

The square root of 620478773 is about 24909.4113338714. The cubic root of 620478773 is about 852.9213314493.

The spelling of 620478773 in words is "six hundred twenty million, four hundred seventy-eight thousand, seven hundred seventy-three".