70991005 has 8 divisors (see below), whose sum is σ = 85374432. Its totient is φ = 56669328.

The previous prime is 70990991. The next prime is 70991017. The reversal of 70991005 is 50019907.

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 70991005 - 2¹⁷ = 70859933 is a prime.

It is a Duffinian number.

It is a congruent 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, 12867 + ... + 17536.

It is an arithmetic number, because the mean of its divisors is an integer number (10671804).

Almost surely, 2^70991005 is an apocalyptic number.

It is an amenable number.

70991005 is a deficient number, since it is larger than the sum of its proper divisors (14383427).

70991005 is a wasteful number, since it uses less digits than its factorization.

70991005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30875.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 70991005 is about 8425.6160012191. The cubic root of 70991005 is about 414.0642875110.

The spelling of 70991005 in words is "seventy million, nine hundred ninety-one thousand, five".