42997473 has 10 divisors (see below), whose sum is σ = 64230914. Its totient is φ = 28664928.

The previous prime is 42997447. The next prime is 42997519. The reversal of 42997473 is 37479924.

It can be written as a sum of positive squares in only one way, i.e., 42810849 + 186624 = 6543^2 + 432^2 .

It is not a de Polignac number, because 42997473 - 2¹⁶ = 42931937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42995473) 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, 265336 + ... + 265497.

Almost surely, 2^42997473 is an apocalyptic number.

It is an amenable number.

42997473 is a deficient number, since it is larger than the sum of its proper divisors (21233441).

42997473 is an equidigital number, since it uses as much as digits as its factorization.

42997473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530845 (or 530836 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 42997473 is about 6557.2458395274. The cubic root of 42997473 is about 350.3329430462.

The spelling of 42997473 in words is "forty-two million, nine hundred ninety-seven thousand, four hundred seventy-three".