1629221849 has 2 divisors, whose sum is σ = 1629221850. Its totient is φ = 1629221848.

The previous prime is 1629221753. The next prime is 1629221863. The reversal of 1629221849 is 9481229261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1148735449 + 480486400 = 33893^2 + 21920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1629221849 - 2¹² = 1629217753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1629221249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814610924 + 814610925.

It is an arithmetic number, because the mean of its divisors is an integer number (814610925).

Almost surely, 2^1629221849 is an apocalyptic number.

It is an amenable number.

1629221849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1629221849 is an equidigital number, since it uses as much as digits as its factorization.

1629221849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 44.

The square root of 1629221849 is about 40363.6203653736. The cubic root of 1629221849 is about 1176.6846151856.

The spelling of 1629221849 in words is "one billion, six hundred twenty-nine million, two hundred twenty-one thousand, eight hundred forty-nine".