620034257 has 2 divisors, whose sum is σ = 620034258. Its totient is φ = 620034256.

The previous prime is 620034241. The next prime is 620034269. The reversal of 620034257 is 752430026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 421111441 + 198922816 = 20521^2 + 14104^2 .

It is a cyclic number.

It is not a de Polignac number, because 620034257 - 2⁴ = 620034241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620034287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310017128 + 310017129.

It is an arithmetic number, because the mean of its divisors is an integer number (310017129).

Almost surely, 2^620034257 is an apocalyptic number.

It is an amenable number.

620034257 is a deficient number, since it is larger than the sum of its proper divisors (1).

620034257 is an equidigital number, since it uses as much as digits as its factorization.

620034257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 620034257 is about 24900.4870835893. The cubic root of 620034257 is about 852.7176028824.

The spelling of 620034257 in words is "six hundred twenty million, thirty-four thousand, two hundred fifty-seven".