620468851 has 4 divisors (see below), whose sum is σ = 620536312. Its totient is φ = 620401392.

The previous prime is 620468837. The next prime is 620468897. The reversal of 620468851 is 158864026.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 620468851 - 2⁵ = 620468819 is a prime.

It is a super-2 number, since 2×620468851² = 769963190122520402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620460851) 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, 17250 + ... + 39223.

It is an arithmetic number, because the mean of its divisors is an integer number (155134078).

Almost surely, 2^620468851 is an apocalyptic number.

620468851 is a deficient number, since it is larger than the sum of its proper divisors (67461).

620468851 is a wasteful number, since it uses less digits than its factorization.

620468851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67460.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 620468851 is about 24909.2121714036. The cubic root of 620468851 is about 852.9167851049.

The spelling of 620468851 in words is "six hundred twenty million, four hundred sixty-eight thousand, eight hundred fifty-one".