621419 has 2 divisors, whose sum is σ = 621420. Its totient is φ = 621418.

The previous prime is 621389. The next prime is 621427. The reversal of 621419 is 914126.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621419 is a prime.

It is a super-2 number, since 2×621419² = 772323147122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 621394 and 621403.

It is not a weakly prime, because it can be changed into another prime (621619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310709 + 310710.

It is an arithmetic number, because the mean of its divisors is an integer number (310710).

2⁶²¹⁴¹⁹ is an apocalyptic number.

621419 is a deficient number, since it is larger than the sum of its proper divisors (1).

621419 is an equidigital number, since it uses as much as digits as its factorization.

621419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

The square root of 621419 is about 788.3013383218. The cubic root of 621419 is about 85.3351931696.

It can be divided in two parts, 62 and 1419, that multiplied together give a palindrome (87978).

The spelling of 621419 in words is "six hundred twenty-one thousand, four hundred nineteen".