620812287 has 6 divisors (see below), whose sum is σ = 896728872. Its totient is φ = 413874852.

The previous prime is 620812271. The next prime is 620812303. The reversal of 620812287 is 782218026.

It is a happy number.

620812287 is a `hidden beast` number, since 620 + 8 + 1 + 2 + 28 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (620812271) and next prime (620812303).

It is not a de Polignac number, because 620812287 - 2⁴ = 620812271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620812217) 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 5 ways as a sum of consecutive naturals, for example, 34489563 + ... + 34489580.

It is an arithmetic number, because the mean of its divisors is an integer number (149454812).

Almost surely, 2^620812287 is an apocalyptic number.

620812287 is a deficient number, since it is larger than the sum of its proper divisors (275916585).

620812287 is a wasteful number, since it uses less digits than its factorization.

620812287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68979149 (or 68979146 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 620812287 is about 24916.1049724872. The cubic root of 620812287 is about 853.0741222003.

The spelling of 620812287 in words is "six hundred twenty million, eight hundred twelve thousand, two hundred eighty-seven".