42748663 has 2 divisors, whose sum is σ = 42748664. Its totient is φ = 42748662.

The previous prime is 42748633. The next prime is 42748669. The reversal of 42748663 is 36684724.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42748663 - 2⁵ = 42748631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42748669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21374331 + 21374332.

It is an arithmetic number, because the mean of its divisors is an integer number (21374332).

Almost surely, 2^42748663 is an apocalyptic number.

42748663 is a deficient number, since it is larger than the sum of its proper divisors (1).

42748663 is an equidigital number, since it uses as much as digits as its factorization.

42748663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 40.

The square root of 42748663 is about 6538.2461715662. The cubic root of 42748663 is about 349.6558876375.

The spelling of 42748663 in words is "forty-two million, seven hundred forty-eight thousand, six hundred sixty-three".