70091861 has 8 divisors (see below), whose sum is σ = 81005760. Its totient is φ = 59403168.

The previous prime is 70091851. The next prime is 70091873. The reversal of 70091861 is 16819007.

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 70091861 - 2¹⁰ = 70090837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70091821) by changing a digit.

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, 55631 + ... + 56876.

It is an arithmetic number, because the mean of its divisors is an integer number (10125720).

Almost surely, 2^70091861 is an apocalyptic number.

It is an amenable number.

70091861 is a deficient number, since it is larger than the sum of its proper divisors (10913899).

70091861 is a wasteful number, since it uses less digits than its factorization.

70091861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112603.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 70091861 is about 8372.0882102376. The cubic root of 70091861 is about 412.3087299350.

The spelling of 70091861 in words is "seventy million, ninety-one thousand, eight hundred sixty-one".