620066969 has 2 divisors, whose sum is σ = 620066970. Its totient is φ = 620066968.

The previous prime is 620066917. The next prime is 620066983. The reversal of 620066969 is 969660026.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 339001744 + 281065225 = 18412^2 + 16765^2 .

It is a cyclic number.

It is not a de Polignac number, because 620066969 - 2¹⁶ = 620001433 is a prime.

It is a super-2 number, since 2×620066969² = 768966092089693922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (620066989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310033484 + 310033485.

It is an arithmetic number, because the mean of its divisors is an integer number (310033485).

Almost surely, 2^620066969 is an apocalyptic number.

It is an amenable number.

620066969 is a deficient number, since it is larger than the sum of its proper divisors (1).

620066969 is an equidigital number, since it uses as much as digits as its factorization.

620066969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 620066969 is about 24901.1439295467. The cubic root of 620066969 is about 852.7325986171.

The spelling of 620066969 in words is "six hundred twenty million, sixty-six thousand, nine hundred sixty-nine".