620616739 has 8 divisors (see below), whose sum is σ = 657449568. Its totient is φ = 583820160.

The previous prime is 620616719. The next prime is 620616743. The reversal of 620616739 is 937616026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 620616739 - 2⁷ = 620616611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620616719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31389 + ... + 47185.

It is an arithmetic number, because the mean of its divisors is an integer number (82181196).

Almost surely, 2^620616739 is an apocalyptic number.

620616739 is a deficient number, since it is larger than the sum of its proper divisors (36832829).

620616739 is a wasteful number, since it uses less digits than its factorization.

620616739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18125.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 620616739 is about 24912.1805348307. The cubic root of 620616739 is about 852.9845436164.

The spelling of 620616739 in words is "six hundred twenty million, six hundred sixteen thousand, seven hundred thirty-nine".