1629139 has 4 divisors (see below), whose sum is σ = 1640080. Its totient is φ = 1618200.

The previous prime is 1629137. The next prime is 1629149. The reversal of 1629139 is 9319261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1629139 - 2¹ = 1629137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1629139.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1629137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5244 + ... + 5545.

It is an arithmetic number, because the mean of its divisors is an integer number (410020).

2^1629139 is an apocalyptic number.

1629139 is a deficient number, since it is larger than the sum of its proper divisors (10941).

1629139 is a wasteful number, since it uses less digits than its factorization.

1629139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10940.

The product of its digits is 2916, while the sum is 31.

The square root of 1629139 is about 1276.3772953167. The cubic root of 1629139 is about 117.6664669304. Note that the first 3 decimals are identical.

The spelling of 1629139 in words is "one million, six hundred twenty-nine thousand, one hundred thirty-nine".