620145887 has 4 divisors (see below), whose sum is σ = 621558960. Its totient is φ = 618732816.

The previous prime is 620145881. The next prime is 620145893. The reversal of 620145887 is 788541026.

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

It is an interprime number because it is at equal distance from previous prime (620145881) and next prime (620145893).

It is a cyclic number.

It is not a de Polignac number, because 620145887 - 2¹² = 620141791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620145881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705878 + ... + 706755.

It is an arithmetic number, because the mean of its divisors is an integer number (155389740).

Almost surely, 2^620145887 is an apocalyptic number.

620145887 is a deficient number, since it is larger than the sum of its proper divisors (1413073).

620145887 is a wasteful number, since it uses less digits than its factorization.

620145887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413072.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 620145887 is about 24902.7285051257. The cubic root of 620145887 is about 852.7687737938.

The spelling of 620145887 in words is "six hundred twenty million, one hundred forty-five thousand, eight hundred eighty-seven".