620007281 has 2 divisors, whose sum is σ = 620007282. Its totient is φ = 620007280.

The previous prime is 620007277. The next prime is 620007299. The reversal of 620007281 is 182700026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 607869025 + 12138256 = 24655^2 + 3484^2 .

It is a cyclic number.

It is not a de Polignac number, because 620007281 - 2² = 620007277 is a prime.

It is a super-2 number, since 2×620007281² = 768818056986025922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 620007281.

It is not a weakly prime, because it can be changed into another prime (620007181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310003640 + 310003641.

It is an arithmetic number, because the mean of its divisors is an integer number (310003641).

Almost surely, 2^620007281 is an apocalyptic number.

It is an amenable number.

620007281 is a deficient number, since it is larger than the sum of its proper divisors (1).

620007281 is an equidigital number, since it uses as much as digits as its factorization.

620007281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 620007281 is about 24899.9454015466. The cubic root of 620007281 is about 852.7052362304.

The spelling of 620007281 in words is "six hundred twenty million, seven thousand, two hundred eighty-one".