70387 has 4 divisors (see below), whose sum is σ = 71640. Its totient is φ = 69136.

The previous prime is 70381. The next prime is 70393. The reversal of 70387 is 78307.

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

It is an interprime number because it is at equal distance from previous prime (70381) and next prime (70393).

It is a cyclic number.

It is not a de Polignac number, because 70387 - 2³ = 70379 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538 + ... + 655.

It is an arithmetic number, because the mean of its divisors is an integer number (17910).

2⁷⁰³⁸⁷ is an apocalyptic number.

70387 is a deficient number, since it is larger than the sum of its proper divisors (1253).

70387 is a wasteful number, since it uses less digits than its factorization.

70387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 70387 is about 265.3054843006. The cubic root of 70387 is about 41.2886628630.

The spelling of 70387 in words is "seventy thousand, three hundred eighty-seven".