620826887 has 4 divisors (see below), whose sum is σ = 627802560. Its totient is φ = 613851216.

The previous prime is 620826847. The next prime is 620826889. The reversal of 620826887 is 788628026.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788628026 = 2 ⋅394314013.

It is a cyclic number.

It is not a de Polignac number, because 620826887 - 2⁶ = 620826823 is a prime.

It is a super-2 number, since 2×620826887² = 770852047244221538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620826889) 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, 3487703 + ... + 3487880.

It is an arithmetic number, because the mean of its divisors is an integer number (156950640).

Almost surely, 2^620826887 is an apocalyptic number.

620826887 is a deficient number, since it is larger than the sum of its proper divisors (6975673).

620826887 is an equidigital number, since it uses as much as digits as its factorization.

620826887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6975672.

The product of its (nonzero) digits is 516096, while the sum is 47.

The square root of 620826887 is about 24916.3979539580. The cubic root of 620826887 is about 853.0808095597.

The spelling of 620826887 in words is "six hundred twenty million, eight hundred twenty-six thousand, eight hundred eighty-seven".