1955078443 has 4 divisors (see below), whose sum is σ = 1955180448. Its totient is φ = 1954976440.

The previous prime is 1955078429. The next prime is 1955078509. The reversal of 1955078443 is 3448705591.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3448705591 = 4057 ⋅850063.

It is a cyclic number.

It is not a de Polignac number, because 1955078443 - 2⁹ = 1955077931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1955078393 and 1955078402.

It is not an unprimeable number, because it can be changed into a prime (1955078143) 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, 12628 + ... + 63793.

It is an arithmetic number, because the mean of its divisors is an integer number (488795112).

Almost surely, 2^1955078443 is an apocalyptic number.

1955078443 is a deficient number, since it is larger than the sum of its proper divisors (102005).

1955078443 is an equidigital number, since it uses as much as digits as its factorization.

1955078443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102004.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 1955078443 is about 44216.2689855216. The cubic root of 1955078443 is about 1250.4165956497.

The spelling of 1955078443 in words is "one billion, nine hundred fifty-five million, seventy-eight thousand, four hundred forty-three".