1629046021 has 2 divisors, whose sum is σ = 1629046022. Its totient is φ = 1629046020.

The previous prime is 1629045947. The next prime is 1629046037. The reversal of 1629046021 is 1206409261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1628122500 + 923521 = 40350^2 + 961^2 .

It is a cyclic number.

It is not a de Polignac number, because 1629046021 - 2²⁹ = 1092175109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1629046091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814523010 + 814523011.

It is an arithmetic number, because the mean of its divisors is an integer number (814523011).

Almost surely, 2^1629046021 is an apocalyptic number.

It is an amenable number.

1629046021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1629046021 is an equidigital number, since it uses as much as digits as its factorization.

1629046021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1629046021 is about 40361.4422561930. The cubic root of 1629046021 is about 1176.6422838223.

The spelling of 1629046021 in words is "one billion, six hundred twenty-nine million, forty-six thousand, twenty-one".