42440977 has 2 divisors, whose sum is σ = 42440978. Its totient is φ = 42440976.

The previous prime is 42440963. The next prime is 42440989. The reversal of 42440977 is 77904424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34152336 + 8288641 = 5844^2 + 2879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42440977 is a prime.

It is not a weakly prime, because it can be changed into another prime (42440917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21220488 + 21220489.

It is an arithmetic number, because the mean of its divisors is an integer number (21220489).

Almost surely, 2^42440977 is an apocalyptic number.

It is an amenable number.

42440977 is a deficient number, since it is larger than the sum of its proper divisors (1).

42440977 is an equidigital number, since it uses as much as digits as its factorization.

42440977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 42440977 is about 6514.6739749584. The cubic root of 42440977 is about 348.8149773373.

The spelling of 42440977 in words is "forty-two million, four hundred forty thousand, nine hundred seventy-seven".