71398087 has 8 divisors (see below), whose sum is σ = 73962000. Its totient is φ = 68841024.

The previous prime is 71398051. The next prime is 71398091. The reversal of 71398087 is 78089317.

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 71398087 - 2⁷ = 71397959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71393087) 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, 29248 + ... + 31594.

It is an arithmetic number, because the mean of its divisors is an integer number (9245250).

Almost surely, 2^71398087 is an apocalyptic number.

71398087 is a deficient number, since it is larger than the sum of its proper divisors (2563913).

71398087 is a wasteful number, since it uses less digits than its factorization.

71398087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 71398087 is about 8449.7388717049. The cubic root of 71398087 is about 414.8542324461.

The spelling of 71398087 in words is "seventy-one million, three hundred ninety-eight thousand, eighty-seven".