70640985 has 8 divisors (see below), whose sum is σ = 113025600. Its totient is φ = 37675184.

The previous prime is 70640963. The next prime is 70641037. The reversal of 70640985 is 58904607.

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 70640985 - 2⁹ = 70640473 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2354685 + ... + 2354714.

It is an arithmetic number, because the mean of its divisors is an integer number (14128200).

Almost surely, 2^70640985 is an apocalyptic number.

It is an amenable number.

70640985 is a deficient number, since it is larger than the sum of its proper divisors (42384615).

70640985 is a wasteful number, since it uses less digits than its factorization.

70640985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709407.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 70640985 is about 8404.8191533191. The cubic root of 70640985 is about 413.3826535985.

The spelling of 70640985 in words is "seventy million, six hundred forty thousand, nine hundred eighty-five".