621678341 has 2 divisors, whose sum is σ = 621678342. Its totient is φ = 621678340.

The previous prime is 621678319. The next prime is 621678359. The reversal of 621678341 is 143876126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614544100 + 7134241 = 24790^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 621678341 - 2¹⁸ = 621416197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 621678295 and 621678304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621677341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310839170 + 310839171.

It is an arithmetic number, because the mean of its divisors is an integer number (310839171).

Almost surely, 2^621678341 is an apocalyptic number.

It is an amenable number.

621678341 is a deficient number, since it is larger than the sum of its proper divisors (1).

621678341 is an equidigital number, since it uses as much as digits as its factorization.

621678341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 621678341 is about 24933.4783173147. The cubic root of 621678341 is about 853.4706268997.

The spelling of 621678341 in words is "six hundred twenty-one million, six hundred seventy-eight thousand, three hundred forty-one".