620065439 has 4 divisors (see below), whose sum is σ = 708646224. Its totient is φ = 531484656.

The previous prime is 620065417. The next prime is 620065471. The reversal of 620065439 is 934560026.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620065439 is a prime.

It is a super-2 number, since 2×620065439² = 768962297284525442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 620065399 and 620065408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620065409) 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, 44290382 + ... + 44290395.

It is an arithmetic number, because the mean of its divisors is an integer number (177161556).

Almost surely, 2^620065439 is an apocalyptic number.

620065439 is a deficient number, since it is larger than the sum of its proper divisors (88580785).

620065439 is an equidigital number, since it uses as much as digits as its factorization.

620065439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88580784.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 620065439 is about 24901.1132080475. The cubic root of 620065439 is about 852.7318972510.

The spelling of 620065439 in words is "six hundred twenty million, sixty-five thousand, four hundred thirty-nine".