620781171 has 8 divisors (see below), whose sum is σ = 827823504. Its totient is φ = 413796480.

The previous prime is 620781157. The next prime is 620781179. The reversal of 620781171 is 171187026.

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

It is not a de Polignac number, because 620781171 - 2⁷ = 620781043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620781179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33111 + ... + 48351.

It is an arithmetic number, because the mean of its divisors is an integer number (103477938).

Almost surely, 2^620781171 is an apocalyptic number.

620781171 is a deficient number, since it is larger than the sum of its proper divisors (207042333).

620781171 is a wasteful number, since it uses less digits than its factorization.

620781171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28821.

The product of its (nonzero) digits is 4704, while the sum is 33.

The square root of 620781171 is about 24915.4805492489. The cubic root of 620781171 is about 853.0598695304.

It can be divided in two parts, 6207 and 81171, that added together give a palindrome (87378).

The spelling of 620781171 in words is "six hundred twenty million, seven hundred eighty-one thousand, one hundred seventy-one".