1978876433 has 2 divisors, whose sum is σ = 1978876434. Its totient is φ = 1978876432.

The previous prime is 1978876411. The next prime is 1978876441. The reversal of 1978876433 is 3346788791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1675837969 + 303038464 = 40937^2 + 17408^2 .

It is an emirp because it is prime and its reverse (3346788791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1978876433 - 2²⁶ = 1911767569 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1978876633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989438216 + 989438217.

It is an arithmetic number, because the mean of its divisors is an integer number (989438217).

Almost surely, 2^1978876433 is an apocalyptic number.

It is an amenable number.

1978876433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1978876433 is an equidigital number, since it uses as much as digits as its factorization.

1978876433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 56.

The square root of 1978876433 is about 44484.5639857243. The cubic root of 1978876433 is about 1255.4696702961.

The spelling of 1978876433 in words is "one billion, nine hundred seventy-eight million, eight hundred seventy-six thousand, four hundred thirty-three".