42398827 has 2 divisors, whose sum is σ = 42398828. Its totient is φ = 42398826.

The previous prime is 42398803. The next prime is 42398893. The reversal of 42398827 is 72889324.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42398827 - 2¹¹ = 42396779 is a prime.

It is not a weakly prime, because it can be changed into another prime (42398627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21199413 + 21199414.

It is an arithmetic number, because the mean of its divisors is an integer number (21199414).

Almost surely, 2^42398827 is an apocalyptic number.

42398827 is a deficient number, since it is larger than the sum of its proper divisors (1).

42398827 is an equidigital number, since it uses as much as digits as its factorization.

42398827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The square root of 42398827 is about 6511.4381667954. The cubic root of 42398827 is about 348.6994645925.

The spelling of 42398827 in words is "forty-two million, three hundred ninety-eight thousand, eight hundred twenty-seven".