70787 has 4 divisors (see below), whose sum is σ = 71856. Its totient is φ = 69720.

The previous prime is 70783. The next prime is 70793. The reversal of 70787 is 78707.

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

It is a cyclic number.

It is not a de Polignac number, because 70787 - 2² = 70783 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 (70783) 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, 428 + ... + 569.

It is an arithmetic number, because the mean of its divisors is an integer number (17964).

2⁷⁰⁷⁸⁷ is an apocalyptic number.

70787 is a deficient number, since it is larger than the sum of its proper divisors (1069).

70787 is an equidigital number, since it uses as much as digits as its factorization.

70787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068.

The product of its (nonzero) digits is 2744, while the sum is 29.

The square root of 70787 is about 266.0582642956. The cubic root of 70787 is about 41.3667278394.

The spelling of 70787 in words is "seventy thousand, seven hundred eighty-seven".