1678018963 has 4 divisors (see below), whose sum is σ = 1687289968. Its totient is φ = 1668747960.

The previous prime is 1678018919. The next prime is 1678018973. The reversal of 1678018963 is 3698108761.

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 1678018963 - 2²⁹ = 1141148051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1678018913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4635231 + ... + 4635592.

It is an arithmetic number, because the mean of its divisors is an integer number (421822492).

Almost surely, 2^1678018963 is an apocalyptic number.

1678018963 is a deficient number, since it is larger than the sum of its proper divisors (9271005).

1678018963 is an equidigital number, since it uses as much as digits as its factorization.

1678018963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9271004.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 1678018963 is about 40963.6297586042. The cubic root of 1678018963 is about 1188.3169397306.

The spelling of 1678018963 in words is "one billion, six hundred seventy-eight million, eighteen thousand, nine hundred sixty-three".