620687171 has 8 divisors (see below), whose sum is σ = 669090240. Its totient is φ = 572378112.

The previous prime is 620687159. The next prime is 620687201. The reversal of 620687171 is 171786026.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620687171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620687141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9470 + ... + 36483.

It is an arithmetic number, because the mean of its divisors is an integer number (83636280).

Almost surely, 2^620687171 is an apocalyptic number.

620687171 is a deficient number, since it is larger than the sum of its proper divisors (48403069).

620687171 is a wasteful number, since it uses less digits than its factorization.

620687171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47005.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 620687171 is about 24913.5941004103. The cubic root of 620687171 is about 853.0168099794.

The spelling of 620687171 in words is "six hundred twenty million, six hundred eighty-seven thousand, one hundred seventy-one".