1628903149 has 2 divisors, whose sum is σ = 1628903150. Its totient is φ = 1628903148.

The previous prime is 1628903147. The next prime is 1628903189. The reversal of 1628903149 is 9413098261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1213477225 + 415425924 = 34835^2 + 20382^2 .

It is a cyclic number.

It is not a de Polignac number, because 1628903149 - 2¹ = 1628903147 is a prime.

Together with 1628903147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1628903147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814451574 + 814451575.

It is an arithmetic number, because the mean of its divisors is an integer number (814451575).

Almost surely, 2^1628903149 is an apocalyptic number.

It is an amenable number.

1628903149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628903149 is an equidigital number, since it uses as much as digits as its factorization.

1628903149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 1628903149 is about 40359.6723103645. The cubic root of 1628903149 is about 1176.6078845177.

The spelling of 1628903149 in words is "one billion, six hundred twenty-eight million, nine hundred three thousand, one hundred forty-nine".