620427109 has 4 divisors (see below), whose sum is σ = 621691200. Its totient is φ = 619163020.

The previous prime is 620427089. The next prime is 620427113. The reversal of 620427109 is 901724026.

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 620427109 - 2⁵ = 620427077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620437109) 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, 631309 + ... + 632290.

It is an arithmetic number, because the mean of its divisors is an integer number (155422800).

Almost surely, 2^620427109 is an apocalyptic number.

It is an amenable number.

620427109 is a deficient number, since it is larger than the sum of its proper divisors (1264091).

620427109 is a wasteful number, since it uses less digits than its factorization.

620427109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264090.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 620427109 is about 24908.3742745286. The cubic root of 620427109 is about 852.8976580363.

The spelling of 620427109 in words is "six hundred twenty million, four hundred twenty-seven thousand, one hundred nine".