1955462891 has 4 divisors (see below), whose sum is σ = 1955800392. Its totient is φ = 1955125392.

The previous prime is 1955462879. The next prime is 1955462911. The reversal of 1955462891 is 1982645591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1982645591 = 43 ⋅46108037.

It is a cyclic number.

It is not a de Polignac number, because 1955462891 - 2⁶ = 1955462827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1955462851) 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, 159905 + ... + 171698.

It is an arithmetic number, because the mean of its divisors is an integer number (488950098).

Almost surely, 2^1955462891 is an apocalyptic number.

1955462891 is a deficient number, since it is larger than the sum of its proper divisors (337501).

1955462891 is an equidigital number, since it uses as much as digits as its factorization.

1955462891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337500.

The product of its digits is 777600, while the sum is 50.

The square root of 1955462891 is about 44220.6161309406. The cubic root of 1955462891 is about 1250.4985512109.

The spelling of 1955462891 in words is "one billion, nine hundred fifty-five million, four hundred sixty-two thousand, eight hundred ninety-one".