1955791 has 4 divisors (see below), whose sum is σ = 1989000. Its totient is φ = 1922584.

The previous prime is 1955777. The next prime is 1955801. The reversal of 1955791 is 1975591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1975591 = 149 ⋅13259.

It is a cyclic number.

It is not a de Polignac number, because 1955791 - 2⁹ = 1955279 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 1955791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955711) 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, 16516 + ... + 16633.

It is an arithmetic number, because the mean of its divisors is an integer number (497250).

2^1955791 is an apocalyptic number.

1955791 is a deficient number, since it is larger than the sum of its proper divisors (33209).

1955791 is an equidigital number, since it uses as much as digits as its factorization.

1955791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33208.

The product of its digits is 14175, while the sum is 37.

The square root of 1955791 is about 1398.4959778276. The cubic root of 1955791 is about 125.0568488085.

The spelling of 1955791 in words is "one million, nine hundred fifty-five thousand, seven hundred ninety-one".