71963963 has 8 divisors (see below), whose sum is σ = 76883520. Its totient is φ = 67157640.

The previous prime is 71963951. The next prime is 71963999. The reversal of 71963963 is 36936917.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71963963 - 2¹⁰ = 71962939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71963863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26993 + ... + 29538.

It is an arithmetic number, because the mean of its divisors is an integer number (9610440).

Almost surely, 2^71963963 is an apocalyptic number.

71963963 is a deficient number, since it is larger than the sum of its proper divisors (4919557).

71963963 is a wasteful number, since it uses less digits than its factorization.

71963963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56617.

The product of its digits is 183708, while the sum is 44.

The square root of 71963963 is about 8483.1576078722. The cubic root of 71963963 is about 415.9473456378.

The spelling of 71963963 in words is "seventy-one million, nine hundred sixty-three thousand, nine hundred sixty-three".