620036609 has 2 divisors, whose sum is σ = 620036610. Its totient is φ = 620036608.

The previous prime is 620036569. The next prime is 620036663. The reversal of 620036609 is 906630026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343546225 + 276490384 = 18535^2 + 16628^2 .

It is a cyclic number.

It is not a de Polignac number, because 620036609 - 2¹² = 620032513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620036689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310018304 + 310018305.

It is an arithmetic number, because the mean of its divisors is an integer number (310018305).

Almost surely, 2^620036609 is an apocalyptic number.

It is an amenable number.

620036609 is a deficient number, since it is larger than the sum of its proper divisors (1).

620036609 is an equidigital number, since it uses as much as digits as its factorization.

620036609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 620036609 is about 24900.5343115364. The cubic root of 620036609 is about 852.7186810967.

The spelling of 620036609 in words is "six hundred twenty million, thirty-six thousand, six hundred nine".