620421109 has 16 divisors (see below), whose sum is σ = 779429376. Its totient is φ = 479746800.

The previous prime is 620421101. The next prime is 620421119. The reversal of 620421109 is 901124026.

It is a cyclic number.

It is not a de Polignac number, because 620421109 - 2³ = 620421101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620421101) 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, 20667 + ... + 40840.

It is an arithmetic number, because the mean of its divisors is an integer number (48714336).

Almost surely, 2^620421109 is an apocalyptic number.

It is an amenable number.

620421109 is a deficient number, since it is larger than the sum of its proper divisors (159008267).

620421109 is a wasteful number, since it uses less digits than its factorization.

620421109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61656.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 620421109 is about 24908.2538328161. The cubic root of 620421109 is about 852.8949086387.

The spelling of 620421109 in words is "six hundred twenty million, four hundred twenty-one thousand, one hundred nine".