71139994 has 8 divisors (see below), whose sum is σ = 107810388. Its totient is φ = 35203200.

The previous prime is 71139983. The next prime is 71140001. The reversal of 71139994 is 49993117.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63920025 + 7219969 = 7995^2 + 2687^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 71139994.

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, 183157 + ... + 183544.

Almost surely, 2^71139994 is an apocalyptic number.

71139994 is a deficient number, since it is larger than the sum of its proper divisors (36670394).

71139994 is a wasteful number, since it uses less digits than its factorization.

71139994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366800.

The product of its digits is 61236, while the sum is 43.

The square root of 71139994 is about 8434.4527978998. The cubic root of 71139994 is about 414.3537510251.

The spelling of 71139994 in words is "seventy-one million, one hundred thirty-nine thousand, nine hundred ninety-four".