42977663 has 2 divisors, whose sum is σ = 42977664. Its totient is φ = 42977662.

The previous prime is 42977657. The next prime is 42977707. The reversal of 42977663 is 36677924.

It is a happy number.

It is an a-pointer prime, because the next prime (42977707) can be obtained adding 42977663 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42977663 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42977603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21488831 + 21488832.

It is an arithmetic number, because the mean of its divisors is an integer number (21488832).

Almost surely, 2^42977663 is an apocalyptic number.

42977663 is a deficient number, since it is larger than the sum of its proper divisors (1).

42977663 is an equidigital number, since it uses as much as digits as its factorization.

42977663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 44.

The square root of 42977663 is about 6555.7351227761. The cubic root of 42977663 is about 350.2791324288.

The spelling of 42977663 in words is "forty-two million, nine hundred seventy-seven thousand, six hundred sixty-three".