620617697 has 16 divisors (see below), whose sum is σ = 729910272. Its totient is φ = 516602880.

The previous prime is 620617663. The next prime is 620617733. The reversal of 620617697 is 796716026.

It is a cyclic number.

It is not a de Polignac number, because 620617697 - 2¹⁰ = 620616673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620617897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59153 + ... + 68849.

It is an arithmetic number, because the mean of its divisors is an integer number (45619392).

Almost surely, 2^620617697 is an apocalyptic number.

It is an amenable number.

620617697 is a deficient number, since it is larger than the sum of its proper divisors (109292575).

620617697 is a wasteful number, since it uses less digits than its factorization.

620617697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9968.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 620617697 is about 24912.1997623654. The cubic root of 620617697 is about 852.9849825125.

The spelling of 620617697 in words is "six hundred twenty million, six hundred seventeen thousand, six hundred ninety-seven".