70506987 has 4 divisors (see below), whose sum is σ = 94009320. Its totient is φ = 47004656.

The previous prime is 70506979. The next prime is 70507009. The reversal of 70506987 is 78960507.

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 70506987 - 2³ = 70506979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70502987) 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, 11751162 + ... + 11751167.

It is an arithmetic number, because the mean of its divisors is an integer number (23502330).

Almost surely, 2^70506987 is an apocalyptic number.

70506987 is a deficient number, since it is larger than the sum of its proper divisors (23502333).

70506987 is a wasteful number, since it uses less digits than its factorization.

70506987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23502332.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 70506987 is about 8396.8438713602. The cubic root of 70506987 is about 413.1211080279.

The spelling of 70506987 in words is "seventy million, five hundred six thousand, nine hundred eighty-seven".