620606623 has 16 divisors (see below), whose sum is σ = 766757376. Its totient is φ = 489143520.

The previous prime is 620606603. The next prime is 620606683. The reversal of 620606623 is 326606026.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620606623 is a prime.

It is a super-2 number, since 2×620606623² = 770305161022928258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620606603) 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 15 ways as a sum of consecutive naturals, for example, 10968 + ... + 36898.

It is an arithmetic number, because the mean of its divisors is an integer number (47922336).

Almost surely, 2^620606623 is an apocalyptic number.

620606623 is a deficient number, since it is larger than the sum of its proper divisors (146150753).

620606623 is a wasteful number, since it uses less digits than its factorization.

620606623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26214.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 620606623 is about 24911.9775007927. The cubic root of 620606623 is about 852.9799090661.

The spelling of 620606623 in words is "six hundred twenty million, six hundred six thousand, six hundred twenty-three".