620670051 has 24 divisors (see below), whose sum is σ = 954223920. Its totient is φ = 387403776.

The previous prime is 620670049. The next prime is 620670091. The reversal of 620670051 is 150076026.

It is not a de Polignac number, because 620670051 - 2¹ = 620670049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 620669997 and 620670024.

It is not an unprimeable number, because it can be changed into a prime (620670091) 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 23 ways as a sum of consecutive naturals, for example, 19020 + ... + 40038.

It is an arithmetic number, because the mean of its divisors is an integer number (39759330).

Almost surely, 2^620670051 is an apocalyptic number.

620670051 is a deficient number, since it is larger than the sum of its proper divisors (333553869).

620670051 is a wasteful number, since it uses less digits than its factorization.

620670051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21235 (or 21232 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 620670051 is about 24913.2505105215. The cubic root of 620670051 is about 853.0089671762.

The spelling of 620670051 in words is "six hundred twenty million, six hundred seventy thousand, fifty-one".