620948281 has 2 divisors, whose sum is σ = 620948282. Its totient is φ = 620948280.

The previous prime is 620948269. The next prime is 620948311. The reversal of 620948281 is 182849026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620458281 + 490000 = 24909^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 620948281 - 2⁵ = 620948249 is a prime.

It is a super-2 number, since 2×620948281² = 771153535353709922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (620948231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310474140 + 310474141.

It is an arithmetic number, because the mean of its divisors is an integer number (310474141).

Almost surely, 2^620948281 is an apocalyptic number.

It is an amenable number.

620948281 is a deficient number, since it is larger than the sum of its proper divisors (1).

620948281 is an equidigital number, since it uses as much as digits as its factorization.

620948281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 620948281 is about 24918.8338611581. The cubic root of 620948281 is about 853.1364086029.

The spelling of 620948281 in words is "six hundred twenty million, nine hundred forty-eight thousand, two hundred eighty-one".