1864978463 has 2 divisors, whose sum is σ = 1864978464. Its totient is φ = 1864978462.

The previous prime is 1864978457. The next prime is 1864978537. The reversal of 1864978463 is 3648794681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1864978463 - 2⁴ = 1864978447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1864978399 and 1864978408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1864978403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932489231 + 932489232.

It is an arithmetic number, because the mean of its divisors is an integer number (932489232).

Almost surely, 2^1864978463 is an apocalyptic number.

1864978463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1864978463 is an equidigital number, since it uses as much as digits as its factorization.

1864978463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 56.

The square root of 1864978463 is about 43185.3964089714. The cubic root of 1864978463 is about 1230.9052016457.

The spelling of 1864978463 in words is "one billion, eight hundred sixty-four million, nine hundred seventy-eight thousand, four hundred sixty-three".