42878863 has 2 divisors, whose sum is σ = 42878864. Its totient is φ = 42878862.

The previous prime is 42878851. The next prime is 42878873. The reversal of 42878863 is 36887824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42878863 - 2⁹ = 42878351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42878833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439431 + 21439432.

It is an arithmetic number, because the mean of its divisors is an integer number (21439432).

Almost surely, 2^42878863 is an apocalyptic number.

42878863 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878863 is an equidigital number, since it uses as much as digits as its factorization.

42878863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 46.

The square root of 42878863 is about 6548.1954002611. The cubic root of 42878863 is about 350.0105112489.

The spelling of 42878863 in words is "forty-two million, eight hundred seventy-eight thousand, eight hundred sixty-three".