42878707 has 2 divisors, whose sum is σ = 42878708. Its totient is φ = 42878706.

The previous prime is 42878701. The next prime is 42878723. The reversal of 42878707 is 70787824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42878707 - 2³ = 42878699 is a prime.

It is equal to p_2597695 and since 42878707 and 2597695 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42878701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439353 + 21439354.

It is an arithmetic number, because the mean of its divisors is an integer number (21439354).

Almost surely, 2^42878707 is an apocalyptic number.

42878707 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878707 is an equidigital number, since it uses as much as digits as its factorization.

42878707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 175616, while the sum is 43.

The square root of 42878707 is about 6548.1834885715. The cubic root of 42878707 is about 350.0100867841.

The spelling of 42878707 in words is "forty-two million, eight hundred seventy-eight thousand, seven hundred seven".