620403461 has 2 divisors, whose sum is σ = 620403462. Its totient is φ = 620403460.

The previous prime is 620403437. The next prime is 620403463. The reversal of 620403461 is 164304026.

620403461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595652836 + 24750625 = 24406^2 + 4975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620403461 is a prime.

Together with 620403463, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620403461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620403463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310201730 + 310201731.

It is an arithmetic number, because the mean of its divisors is an integer number (310201731).

Almost surely, 2^620403461 is an apocalyptic number.

It is an amenable number.

620403461 is a deficient number, since it is larger than the sum of its proper divisors (1).

620403461 is an equidigital number, since it uses as much as digits as its factorization.

620403461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 620403461 is about 24907.8995702167. The cubic root of 620403461 is about 852.8868216411.

Adding to 620403461 its reverse (164304026), we get a palindrome (784707487).

The spelling of 620403461 in words is "six hundred twenty million, four hundred three thousand, four hundred sixty-one".