71533970 has 8 divisors (see below), whose sum is σ = 128761164. Its totient is φ = 28613584.

The previous prime is 71533967. The next prime is 71533997. The reversal of 71533970 is 7933517.

It can be written as a sum of positive squares in 2 ways, for example, as 60637369 + 10896601 = 7787^2 + 3301^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71533970.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3576689 + ... + 3576708.

Almost surely, 2^71533970 is an apocalyptic number.

71533970 is a deficient number, since it is larger than the sum of its proper divisors (57227194).

71533970 is a wasteful number, since it uses less digits than its factorization.

71533970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7153404.

The product of its (nonzero) digits is 19845, while the sum is 35.

The square root of 71533970 is about 8457.7757123253. The cubic root of 71533970 is about 415.1172456263.

The spelling of 71533970 in words is "seventy-one million, five hundred thirty-three thousand, nine hundred seventy".