1953139 has 4 divisors (see below), whose sum is σ = 1980720. Its totient is φ = 1925560.

The previous prime is 1953109. The next prime is 1953151. The reversal of 1953139 is 9313591.

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 1953139 - 2⁹ = 1952627 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1953139 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1953139.

It is not an unprimeable number, because it can be changed into a prime (1953109) 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, 13684 + ... + 13825.

It is an arithmetic number, because the mean of its divisors is an integer number (495180).

2^1953139 is an apocalyptic number.

1953139 is a deficient number, since it is larger than the sum of its proper divisors (27581).

1953139 is an equidigital number, since it uses as much as digits as its factorization.

1953139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27580.

The product of its digits is 3645, while the sum is 31.

The square root of 1953139 is about 1397.5474947207. The cubic root of 1953139 is about 125.0002986660. Note that the first 3 decimals are identical.

The spelling of 1953139 in words is "one million, nine hundred fifty-three thousand, one hundred thirty-nine".