620468781 has 8 divisors (see below), whose sum is σ = 828151104. Its totient is φ = 413216160.

The previous prime is 620468773. The next prime is 620468789. The reversal of 620468781 is 187864026.

It is an interprime number because it is at equal distance from previous prime (620468773) and next prime (620468789).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 620468781 - 2³ = 620468773 is a prime.

It is a super-2 number, since 2×620468781² = 769963016391251922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620468789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104040 + ... + 109841.

It is an arithmetic number, because the mean of its divisors is an integer number (103518888).

Almost surely, 2^620468781 is an apocalyptic number.

It is an amenable number.

620468781 is a deficient number, since it is larger than the sum of its proper divisors (207682323).

620468781 is a wasteful number, since it uses less digits than its factorization.

620468781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214851.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 620468781 is about 24909.2107663009. The cubic root of 620468781 is about 852.9167530302.

The spelling of 620468781 in words is "six hundred twenty million, four hundred sixty-eight thousand, seven hundred eighty-one".