620138164 has 6 divisors (see below), whose sum is σ = 1085241794. Its totient is φ = 310069080.

The previous prime is 620138159. The next prime is 620138179. The reversal of 620138164 is 461831026.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 620010000 + 128164 = 24900^2 + 358^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77517267 + ... + 77517274.

Almost surely, 2^620138164 is an apocalyptic number.

It is an amenable number.

620138164 is a deficient number, since it is larger than the sum of its proper divisors (465103630).

620138164 is a wasteful number, since it uses less digits than its factorization.

620138164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155034545 (or 155034543 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 620138164 is about 24902.5734413132. The cubic root of 620138164 is about 852.7652337877.

The spelling of 620138164 in words is "six hundred twenty million, one hundred thirty-eight thousand, one hundred sixty-four".