620957 has 2 divisors, whose sum is σ = 620958. Its totient is φ = 620956.

The previous prime is 620947. The next prime is 620981. The reversal of 620957 is 759026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 568516 + 52441 = 754^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 620957 - 2¹⁶ = 555421 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620957.

It is not a weakly prime, because it can be changed into another prime (620947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310478 + 310479.

It is an arithmetic number, because the mean of its divisors is an integer number (310479).

2⁶²⁰⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

620957 is a deficient number, since it is larger than the sum of its proper divisors (1).

620957 is an equidigital number, since it uses as much as digits as its factorization.

620957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 620957 is about 788.0082486878. The cubic root of 620957 is about 85.3140401668.

The spelling of 620957 in words is "six hundred twenty thousand, nine hundred fifty-seven".