70131805 has 8 divisors (see below), whose sum is σ = 84220344. Its totient is φ = 56064000.

The previous prime is 70131791. The next prime is 70131811. The reversal of 70131805 is 50813107.

It can be written as a sum of positive squares in 4 ways, for example, as 12766329 + 57365476 = 3573^2 + 7574^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70131805 - 2⁹ = 70131293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70131805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3625 + ... + 12385.

It is an arithmetic number, because the mean of its divisors is an integer number (10527543).

Almost surely, 2^70131805 is an apocalyptic number.

It is an amenable number.

70131805 is a deficient number, since it is larger than the sum of its proper divisors (14088539).

70131805 is a wasteful number, since it uses less digits than its factorization.

70131805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10367.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 70131805 is about 8374.4734162812. The cubic root of 70131805 is about 412.3870373265.

The spelling of 70131805 in words is "seventy million, one hundred thirty-one thousand, eight hundred five".