1955899 has 8 divisors (see below), whose sum is σ = 2144880. Its totient is φ = 1768800.

The previous prime is 1955893. The next prime is 1955939. The reversal of 1955899 is 9985591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1955899 - 2⁷ = 1955771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1955893) 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 7 ways as a sum of consecutive naturals, for example, 2629 + ... + 3289.

It is an arithmetic number, because the mean of its divisors is an integer number (268110).

2^1955899 is an apocalyptic number.

1955899 is a deficient number, since it is larger than the sum of its proper divisors (188981).

1955899 is a wasteful number, since it uses less digits than its factorization.

1955899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941.

The product of its digits is 145800, while the sum is 46.

The square root of 1955899 is about 1398.5345902050. The cubic root of 1955899 is about 125.0591506718.

The spelling of 1955899 in words is "one million, nine hundred fifty-five thousand, eight hundred ninety-nine".