620691623 has 8 divisors (see below), whose sum is σ = 633260160. Its totient is φ = 608191480.

The previous prime is 620691619. The next prime is 620691647. The reversal of 620691623 is 326196026.

620691623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 620691623 - 2² = 620691619 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 (620691683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1436 + ... + 35262.

It is an arithmetic number, because the mean of its divisors is an integer number (79157520).

Almost surely, 2^620691623 is an apocalyptic number.

620691623 is a deficient number, since it is larger than the sum of its proper divisors (12568537).

620691623 is a wasteful number, since it uses less digits than its factorization.

620691623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34197.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 620691623 is about 24913.6834490607. The cubic root of 620691623 is about 853.0188494511.

The spelling of 620691623 in words is "six hundred twenty million, six hundred ninety-one thousand, six hundred twenty-three".