70909805 has 48 divisors (see below), whose sum is σ = 100336320. Its totient is φ = 47798784.

The previous prime is 70909801. The next prime is 70909807. The reversal of 70909805 is 50890907.

It is not a de Polignac number, because 70909805 - 2² = 70909801 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70909801) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 854294 + ... + 854376.

It is an arithmetic number, because the mean of its divisors is an integer number (2090340).

Almost surely, 2^70909805 is an apocalyptic number.

It is an amenable number.

70909805 is a deficient number, since it is larger than the sum of its proper divisors (29426515).

70909805 is a wasteful number, since it uses less digits than its factorization.

70909805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 70909805 is about 8420.7959837536. The cubic root of 70909805 is about 413.9063574214.

The spelling of 70909805 in words is "seventy million, nine hundred nine thousand, eight hundred five".