620784417 has 8 divisors (see below), whose sum is σ = 902959200. Its totient is φ = 376232960.

The previous prime is 620784347. The next prime is 620784419. The reversal of 620784417 is 714487026.

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 620784417 - 2²² = 616590113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620784419) 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, 9405792 + ... + 9405857.

It is an arithmetic number, because the mean of its divisors is an integer number (112869900).

Almost surely, 2^620784417 is an apocalyptic number.

It is an amenable number.

620784417 is a deficient number, since it is larger than the sum of its proper divisors (282174783).

620784417 is a wasteful number, since it uses less digits than its factorization.

620784417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18811663.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 620784417 is about 24915.5456893884. The cubic root of 620784417 is about 853.0613563815.

The spelling of 620784417 in words is "six hundred twenty million, seven hundred eighty-four thousand, four hundred seventeen".