620623609 has 4 divisors (see below), whose sum is σ = 624090960. Its totient is φ = 617156260.

The previous prime is 620623583. The next prime is 620623621. The reversal of 620623609 is 906326026.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 620623609 - 2²¹ = 618526457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620623649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1733407 + ... + 1733764.

It is an arithmetic number, because the mean of its divisors is an integer number (156022740).

Almost surely, 2^620623609 is an apocalyptic number.

It is an amenable number.

620623609 is a deficient number, since it is larger than the sum of its proper divisors (3467351).

620623609 is a wasteful number, since it uses less digits than its factorization.

620623609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3467350.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 620623609 is about 24912.3184188064. The cubic root of 620623609 is about 852.9876910137.

The spelling of 620623609 in words is "six hundred twenty million, six hundred twenty-three thousand, six hundred nine".