620912197 has 2 divisors, whose sum is σ = 620912198. Its totient is φ = 620912196.

The previous prime is 620912189. The next prime is 620912213. The reversal of 620912197 is 791219026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439363521 + 181548676 = 20961^2 + 13474^2 .

It is a cyclic number.

It is not a de Polignac number, because 620912197 - 2³ = 620912189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620912167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310456098 + 310456099.

It is an arithmetic number, because the mean of its divisors is an integer number (310456099).

Almost surely, 2^620912197 is an apocalyptic number.

It is an amenable number.

620912197 is a deficient number, since it is larger than the sum of its proper divisors (1).

620912197 is an equidigital number, since it uses as much as digits as its factorization.

620912197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 620912197 is about 24918.1098199683. The cubic root of 620912197 is about 853.1198827120.

The spelling of 620912197 in words is "six hundred twenty million, nine hundred twelve thousand, one hundred ninety-seven".