620225139 has 4 divisors (see below), whose sum is σ = 826966856. Its totient is φ = 413483424.

The previous prime is 620225131. The next prime is 620225149. The reversal of 620225139 is 931522026.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 620225139 - 2³ = 620225131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620225131) 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, 103370854 + ... + 103370859.

It is an arithmetic number, because the mean of its divisors is an integer number (206741714).

Almost surely, 2^620225139 is an apocalyptic number.

620225139 is a deficient number, since it is larger than the sum of its proper divisors (206741717).

620225139 is a wasteful number, since it uses less digits than its factorization.

620225139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206741716.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 620225139 is about 24904.3196855485. The cubic root of 620225139 is about 852.8050989841.

It can be divided in two parts, 62022 and 5139, that added together give a triangular number (67161 = T₃₆₆).

The spelling of 620225139 in words is "six hundred twenty million, two hundred twenty-five thousand, one hundred thirty-nine".