71428473 has 10 divisors (see below), whose sum is σ = 106701914. Its totient is φ = 47618928.

The previous prime is 71428453. The next prime is 71428481. The reversal of 71428473 is 37482417.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 55532304 + 15896169 = 7452^2 + 3987^2 .

It is not a de Polignac number, because 71428473 - 2¹² = 71424377 is a prime.

It is a super-2 number, since 2×71428473² = 10204053510223458, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71428453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 440836 + ... + 440997.

Almost surely, 2^71428473 is an apocalyptic number.

It is an amenable number.

71428473 is a deficient number, since it is larger than the sum of its proper divisors (35273441).

71428473 is an equidigital number, since it uses as much as digits as its factorization.

71428473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881845 (or 881836 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 71428473 is about 8451.5367241703. The cubic root of 71428473 is about 414.9130760995.

The spelling of 71428473 in words is "seventy-one million, four hundred twenty-eight thousand, four hundred seventy-three".