70870087 has 4 divisors (see below), whose sum is σ = 70887960. Its totient is φ = 70852216.

The previous prime is 70870073. The next prime is 70870109. The reversal of 70870087 is 78007807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78007807 = 659 ⋅118373.

It is a cyclic number.

It is not a de Polignac number, because 70870087 - 2⁷ = 70869959 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 (70870187) 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, 28 + ... + 11905.

It is an arithmetic number, because the mean of its divisors is an integer number (17721990).

Almost surely, 2^70870087 is an apocalyptic number.

70870087 is a deficient number, since it is larger than the sum of its proper divisors (17873).

70870087 is a wasteful number, since it uses less digits than its factorization.

70870087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17872.

The product of its (nonzero) digits is 21952, while the sum is 37.

The square root of 70870087 is about 8418.4373252997. The cubic root of 70870087 is about 413.8290639121.

The spelling of 70870087 in words is "seventy million, eight hundred seventy thousand, eighty-seven".