620294009 has 4 divisors (see below), whose sum is σ = 620418960. Its totient is φ = 620169060.

The previous prime is 620293997. The next prime is 620294023. The reversal of 620294009 is 900492026.

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 620294009 - 2²⁰ = 619245433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620294069) 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 3 ways as a sum of consecutive naturals, for example, 54707 + ... + 65064.

It is an arithmetic number, because the mean of its divisors is an integer number (155104740).

Almost surely, 2^620294009 is an apocalyptic number.

It is an amenable number.

620294009 is a deficient number, since it is larger than the sum of its proper divisors (124951).

620294009 is a wasteful number, since it uses less digits than its factorization.

620294009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124950.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 620294009 is about 24905.7023390227. The cubic root of 620294009 is about 852.8366630672.

The spelling of 620294009 in words is "six hundred twenty million, two hundred ninety-four thousand, nine".