1956994219 has 4 divisors (see below), whose sum is σ = 2072111544. Its totient is φ = 1841876896.

The previous prime is 1956994183. The next prime is 1956994279. The reversal of 1956994219 is 9124996591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1956994219 - 2¹⁵ = 1956961451 is a prime.

It is a super-2 number, since 2×1956994219² = 7659652746398839922, which contains 22 as substring.

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 1956994219.

It is not an unprimeable number, because it can be changed into a prime (1956994279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57558637 + ... + 57558670.

It is an arithmetic number, because the mean of its divisors is an integer number (518027886).

Almost surely, 2^1956994219 is an apocalyptic number.

1956994219 is a deficient number, since it is larger than the sum of its proper divisors (115117325).

1956994219 is a wasteful number, since it uses less digits than its factorization.

1956994219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115117324.

The product of its digits is 1574640, while the sum is 55.

The square root of 1956994219 is about 44237.9273813772. The cubic root of 1956994219 is about 1250.8248889135.

The spelling of 1956994219 in words is "one billion, nine hundred fifty-six million, nine hundred ninety-four thousand, two hundred nineteen".