71654963 has 4 divisors (see below), whose sum is σ = 72094728. Its totient is φ = 71215200.

The previous prime is 71654951. The next prime is 71654971. The reversal of 71654963 is 36945617.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71654963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71654963.

It is not an unprimeable number, because it can be changed into a prime (71654923) 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 3 ways as a sum of consecutive naturals, for example, 219638 + ... + 219963.

It is an arithmetic number, because the mean of its divisors is an integer number (18023682).

Almost surely, 2^71654963 is an apocalyptic number.

71654963 is a deficient number, since it is larger than the sum of its proper divisors (439765).

71654963 is a wasteful number, since it uses less digits than its factorization.

71654963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439764.

The product of its digits is 136080, while the sum is 41.

The square root of 71654963 is about 8464.9254574391. The cubic root of 71654963 is about 415.3511577559.

The spelling of 71654963 in words is "seventy-one million, six hundred fifty-four thousand, nine hundred sixty-three".