620136361 has 8 divisors (see below), whose sum is σ = 672323400. Its totient is φ = 568589952.

The previous prime is 620136359. The next prime is 620136367. The reversal of 620136361 is 163631026.

It can be written as a sum of positive squares in 4 ways, for example, as 53934336 + 566202025 = 7344^2 + 23795^2 .

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 620136361 - 2¹ = 620136359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620136367) 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, 158140 + ... + 162013.

It is an arithmetic number, because the mean of its divisors is an integer number (84040425).

Almost surely, 2^620136361 is an apocalyptic number.

It is an amenable number.

620136361 is a deficient number, since it is larger than the sum of its proper divisors (52187039).

620136361 is a wasteful number, since it uses less digits than its factorization.

620136361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320315.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 620136361 is about 24902.5372402091. The cubic root of 620136361 is about 852.7644073390.

Adding to 620136361 its reverse (163631026), we get a palindrome (783767387).

The spelling of 620136361 in words is "six hundred twenty million, one hundred thirty-six thousand, three hundred sixty-one".