42164377 has 2 divisors, whose sum is σ = 42164378. Its totient is φ = 42164376.

The previous prime is 42164333. The next prime is 42164383. The reversal of 42164377 is 77346124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38738176 + 3426201 = 6224^2 + 1851^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42164377 is a prime.

It is not a weakly prime, because it can be changed into another prime (42164387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21082188 + 21082189.

It is an arithmetic number, because the mean of its divisors is an integer number (21082189).

Almost surely, 2^42164377 is an apocalyptic number.

It is an amenable number.

42164377 is a deficient number, since it is larger than the sum of its proper divisors (1).

42164377 is an equidigital number, since it uses as much as digits as its factorization.

42164377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 34.

The square root of 42164377 is about 6493.4102750404. The cubic root of 42164377 is about 348.0555494405.

The spelling of 42164377 in words is "forty-two million, one hundred sixty-four thousand, three hundred seventy-seven".