620798245 has 8 divisors (see below), whose sum is σ = 745092216. Its totient is φ = 496549056.

The previous prime is 620798239. The next prime is 620798249. The reversal of 620798245 is 542897026.

It can be written as a sum of positive squares in 4 ways, for example, as 131194116 + 489604129 = 11454^2 + 22127^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 620798245 - 2⁷ = 620798117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620798249) 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, 44539 + ... + 56791.

It is an arithmetic number, because the mean of its divisors is an integer number (93136527).

Almost surely, 2^620798245 is an apocalyptic number.

It is an amenable number.

620798245 is a deficient number, since it is larger than the sum of its proper divisors (124293971).

620798245 is a wasteful number, since it uses less digits than its factorization.

620798245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22391.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 620798245 is about 24915.8231852773. The cubic root of 620798245 is about 853.0676903275.

The spelling of 620798245 in words is "six hundred twenty million, seven hundred ninety-eight thousand, two hundred forty-five".