620722625 has 8 divisors (see below), whose sum is σ = 774661992. Its totient is φ = 496578000.

The previous prime is 620722621. The next prime is 620722631. The reversal of 620722625 is 526227026.

It can be written as a sum of positive squares in 4 ways, for example, as 123298816 + 497423809 = 11104^2 + 22303^2 .

It is not a de Polignac number, because 620722625 - 2² = 620722621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 620722591 and 620722600.

It is not an unprimeable number, because it can be changed into a prime (620722621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2482766 + ... + 2483015.

It is an arithmetic number, because the mean of its divisors is an integer number (96832749).

Almost surely, 2^620722625 is an apocalyptic number.

It is an amenable number.

620722625 is a deficient number, since it is larger than the sum of its proper divisors (153939367).

620722625 is an equidigital number, since it uses as much as digits as its factorization.

620722625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4965796 (or 4965786 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 620722625 is about 24914.3056294973. The cubic root of 620722625 is about 853.0330512700.

The spelling of 620722625 in words is "six hundred twenty million, seven hundred twenty-two thousand, six hundred twenty-five".