42997797 has 10 divisors (see below), whose sum is σ = 64231398. Its totient is φ = 28665144.

The previous prime is 42997793. The next prime is 42997819. The reversal of 42997797 is 79779924.

It can be written as a sum of positive squares in only one way, i.e., 32558436 + 10439361 = 5706^2 + 3231^2 .

It is not a de Polignac number, because 42997797 - 2² = 42997793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42997793) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 265338 + ... + 265499.

Almost surely, 2^42997797 is an apocalyptic number.

It is an amenable number.

42997797 is a deficient number, since it is larger than the sum of its proper divisors (21233601).

42997797 is an equidigital number, since it uses as much as digits as its factorization.

42997797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530849 (or 530840 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 54.

The square root of 42997797 is about 6557.2705449752. The cubic root of 42997797 is about 350.3338230017. Note that the first 3 decimals are identical.

The spelling of 42997797 in words is "forty-two million, nine hundred ninety-seven thousand, seven hundred ninety-seven".