1021878463 has 4 divisors (see below), whose sum is σ = 1075661560. Its totient is φ = 968095368.

The previous prime is 1021878461. The next prime is 1021878467. The reversal of 1021878463 is 3648781201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3648781201 = 13 ⋅280675477.

It is a cyclic number.

It is not a de Polignac number, because 1021878463 - 2¹ = 1021878461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021878461) 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, 26891520 + ... + 26891557.

It is an arithmetic number, because the mean of its divisors is an integer number (268915390).

Almost surely, 2^1021878463 is an apocalyptic number.

1021878463 is a deficient number, since it is larger than the sum of its proper divisors (53783097).

1021878463 is an equidigital number, since it uses as much as digits as its factorization.

1021878463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53783096.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 1021878463 is about 31966.8337969215. The cubic root of 1021878463 is about 1007.2402729324.

The spelling of 1021878463 in words is "one billion, twenty-one million, eight hundred seventy-eight thousand, four hundred sixty-three".