620478745 has 4 divisors (see below), whose sum is σ = 744574500. Its totient is φ = 496382992.

The previous prime is 620478743. The next prime is 620478773. The reversal of 620478745 is 547874026.

620478745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 335915584 + 284563161 = 18328^2 + 16869^2 .

It is a cyclic number.

It is not a de Polignac number, because 620478745 - 2¹ = 620478743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620478743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62047870 + ... + 62047879.

It is an arithmetic number, because the mean of its divisors is an integer number (186143625).

Almost surely, 2^620478745 is an apocalyptic number.

It is an amenable number.

620478745 is a deficient number, since it is larger than the sum of its proper divisors (124095755).

620478745 is a wasteful number, since it uses less digits than its factorization.

620478745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124095754.

The product of its (nonzero) digits is 376320, while the sum is 43.

The square root of 620478745 is about 24909.4107718348. The cubic root of 620478745 is about 852.9213186195.

The spelling of 620478745 in words is "six hundred twenty million, four hundred seventy-eight thousand, seven hundred forty-five".