620915423 has 4 divisors (see below), whose sum is σ = 622758240. Its totient is φ = 619072608.

The previous prime is 620915419. The next prime is 620915437. The reversal of 620915423 is 324519026.

It is a happy number.

620915423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 620915423 - 2² = 620915419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620915423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620915413) 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, 920903 + ... + 921576.

It is an arithmetic number, because the mean of its divisors is an integer number (155689560).

Almost surely, 2^620915423 is an apocalyptic number.

620915423 is a deficient number, since it is larger than the sum of its proper divisors (1842817).

620915423 is a wasteful number, since it uses less digits than its factorization.

620915423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842816.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 620915423 is about 24918.1745519209. The cubic root of 620915423 is about 853.1213601941.

The spelling of 620915423 in words is "six hundred twenty million, nine hundred fifteen thousand, four hundred twenty-three".