1021878467 has 2 divisors, whose sum is σ = 1021878468. Its totient is φ = 1021878466.

The previous prime is 1021878461. The next prime is 1021878491. The reversal of 1021878467 is 7648781201.

It is a weak prime.

It is an emirp because it is prime and its reverse (7648781201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021878467 - 2²² = 1017684163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021878461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510939233 + 510939234.

It is an arithmetic number, because the mean of its divisors is an integer number (510939234).

Almost surely, 2^1021878467 is an apocalyptic number.

1021878467 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021878467 is an equidigital number, since it uses as much as digits as its factorization.

1021878467 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 44.

The square root of 1021878467 is about 31966.8338594863. The cubic root of 1021878467 is about 1007.2402742466.

The spelling of 1021878467 in words is "one billion, twenty-one million, eight hundred seventy-eight thousand, four hundred sixty-seven".