70840987 has 8 divisors (see below), whose sum is σ = 85222400. Its totient is φ = 57524904.

The previous prime is 70840967. The next prime is 70840993. The reversal of 70840987 is 78904807.

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 70840987 - 2¹⁵ = 70808219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70840927) 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, 266187 + ... + 266452.

It is an arithmetic number, because the mean of its divisors is an integer number (10652800).

Almost surely, 2^70840987 is an apocalyptic number.

70840987 is a deficient number, since it is larger than the sum of its proper divisors (14381413).

70840987 is a wasteful number, since it uses less digits than its factorization.

70840987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532665.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 70840987 is about 8416.7087985744. The cubic root of 70840987 is about 413.7724153085.

The spelling of 70840987 in words is "seventy million, eight hundred forty thousand, nine hundred eighty-seven".