71303663 has 4 divisors (see below), whose sum is σ = 73762440. Its totient is φ = 68844888.

The previous prime is 71303647. The next prime is 71303669. The reversal of 71303663 is 36630317.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71303663 - 2⁴ = 71303647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 2458747 = 71303663 / (7 + 1 + 3 + 0 + 3 + 6 + 6 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71303669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1229345 + ... + 1229402.

It is an arithmetic number, because the mean of its divisors is an integer number (18440610).

Almost surely, 2^71303663 is an apocalyptic number.

71303663 is a deficient number, since it is larger than the sum of its proper divisors (2458777).

71303663 is a wasteful number, since it uses less digits than its factorization.

71303663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458776.

The product of its (nonzero) digits is 6804, while the sum is 29.

The square root of 71303663 is about 8444.1496315496. The cubic root of 71303663 is about 414.6712701344.

The spelling of 71303663 in words is "seventy-one million, three hundred three thousand, six hundred sixty-three".