42381877 has 2 divisors, whose sum is σ = 42381878. Its totient is φ = 42381876.

The previous prime is 42381869. The next prime is 42381881. The reversal of 42381877 is 77818324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34035556 + 8346321 = 5834^2 + 2889^2 .

It is a cyclic number.

It is not a de Polignac number, because 42381877 - 2³ = 42381869 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 (42381887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21190938 + 21190939.

It is an arithmetic number, because the mean of its divisors is an integer number (21190939).

Almost surely, 2^42381877 is an apocalyptic number.

It is an amenable number.

42381877 is a deficient number, since it is larger than the sum of its proper divisors (1).

42381877 is an equidigital number, since it uses as much as digits as its factorization.

42381877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 40.

The square root of 42381877 is about 6510.1364809042. The cubic root of 42381877 is about 348.6529912650.

The spelling of 42381877 in words is "forty-two million, three hundred eighty-one thousand, eight hundred seventy-seven".