1958939 has 4 divisors (see below), whose sum is σ = 2006760. Its totient is φ = 1911120.

The previous prime is 1958917. The next prime is 1958941. The reversal of 1958939 is 9398591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9398591 = 269 ⋅34939.

It is a cyclic number.

It is not a de Polignac number, because 1958939 - 2⁸ = 1958683 is a prime.

It is an Ulam number.

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 1958939.

It is not an unprimeable number, because it can be changed into a prime (1958909) 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, 23849 + ... + 23930.

It is an arithmetic number, because the mean of its divisors is an integer number (501690).

2^1958939 is an apocalyptic number.

1958939 is a deficient number, since it is larger than the sum of its proper divisors (47821).

1958939 is an equidigital number, since it uses as much as digits as its factorization.

1958939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47820.

The product of its digits is 87480, while the sum is 44.

The square root of 1958939 is about 1399.6210201337. The cubic root of 1958939 is about 125.1239091316.

The spelling of 1958939 in words is "one million, nine hundred fifty-eight thousand, nine hundred thirty-nine".