620813867 has 4 divisors (see below), whose sum is σ = 623174640. Its totient is φ = 618453096.

The previous prime is 620813863. The next prime is 620813873. The reversal of 620813867 is 768318026.

It is a happy number.

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 620813867 - 2² = 620813863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620813863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179992 + ... + 1180517.

It is an arithmetic number, because the mean of its divisors is an integer number (155793660).

Almost surely, 2^620813867 is an apocalyptic number.

620813867 is a deficient number, since it is larger than the sum of its proper divisors (2360773).

620813867 is a wasteful number, since it uses less digits than its factorization.

620813867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360772.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 620813867 is about 24916.1366788674. The cubic root of 620813867 is about 853.0748459059.

The spelling of 620813867 in words is "six hundred twenty million, eight hundred thirteen thousand, eight hundred sixty-seven".