621029 has 2 divisors, whose sum is σ = 621030. Its totient is φ = 621028.

The previous prime is 621017. The next prime is 621031. The reversal of 621029 is 920126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 452929 + 168100 = 673^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 621029 - 2⁴ = 621013 is a prime.

Together with 621031, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 621029.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 621029.

It is not a weakly prime, because it can be changed into another prime (621059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310514 + 310515.

It is an arithmetic number, because the mean of its divisors is an integer number (310515).

2⁶²¹⁰²⁹ is an apocalyptic number.

It is an amenable number.

621029 is a deficient number, since it is larger than the sum of its proper divisors (1).

621029 is an equidigital number, since it uses as much as digits as its factorization.

621029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 621029 is about 788.0539321645. The cubic root of 621029 is about 85.3173374287.

The spelling of 621029 in words is "six hundred twenty-one thousand, twenty-nine".