1630139 has 4 divisors (see below), whose sum is σ = 1863024. Its totient is φ = 1397256.

The previous prime is 1630133. The next prime is 1630141. The reversal of 1630139 is 9310361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9310361 = 19 ⋅490019.

It is not a de Polignac number, because 1630139 - 2¹⁶ = 1564603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1630133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116432 + ... + 116445.

It is an arithmetic number, because the mean of its divisors is an integer number (465756).

2^1630139 is an apocalyptic number.

1630139 is a deficient number, since it is larger than the sum of its proper divisors (232885).

1630139 is an equidigital number, since it uses as much as digits as its factorization.

1630139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232884.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 1630139 is about 1276.7689689212. The cubic root of 1630139 is about 117.6905373954.

The spelling of 1630139 in words is "one million, six hundred thirty thousand, one hundred thirty-nine".