42176389 has 2 divisors, whose sum is σ = 42176390. Its totient is φ = 42176388.

The previous prime is 42176369. The next prime is 42176401. The reversal of 42176389 is 98367124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23184225 + 18992164 = 4815^2 + 4358^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42176389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42176369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21088194 + 21088195.

It is an arithmetic number, because the mean of its divisors is an integer number (21088195).

Almost surely, 2^42176389 is an apocalyptic number.

It is an amenable number.

42176389 is a deficient number, since it is larger than the sum of its proper divisors (1).

42176389 is an equidigital number, since it uses as much as digits as its factorization.

42176389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 42176389 is about 6494.3351468799. The cubic root of 42176389 is about 348.0885982414.

The spelling of 42176389 in words is "forty-two million, one hundred seventy-six thousand, three hundred eighty-nine".