1628149 has 2 divisors, whose sum is σ = 1628150. Its totient is φ = 1628148.

The previous prime is 1628131. The next prime is 1628153. The reversal of 1628149 is 9418261.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1249924 + 378225 = 1118^2 + 615^2 .

It is an emirp because it is prime and its reverse (9418261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1628149 - 2⁵ = 1628117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1628149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1622149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814074 + 814075.

It is an arithmetic number, because the mean of its divisors is an integer number (814075).

2^1628149 is an apocalyptic number.

It is an amenable number.

1628149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628149 is an equidigital number, since it uses as much as digits as its factorization.

1628149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 31.

The square root of 1628149 is about 1275.9894200188. The cubic root of 1628149 is about 117.6426274654.

The spelling of 1628149 in words is "one million, six hundred twenty-eight thousand, one hundred forty-nine".