70191001 has 4 divisors (see below), whose sum is σ = 70226100. Its totient is φ = 70155904.

The previous prime is 70190983. The next prime is 70191013. The reversal of 70191001 is 10019107.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21902400 + 48288601 = 4680^2 + 6949^2 .

It is a cyclic number.

It is not a de Polignac number, because 70191001 - 2¹¹ = 70188953 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 70191001.

It is not an unprimeable number, because it can be changed into a prime (70191041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14356 + ... + 18613.

It is an arithmetic number, because the mean of its divisors is an integer number (17556525).

Almost surely, 2^70191001 is an apocalyptic number.

It is an amenable number.

70191001 is a deficient number, since it is larger than the sum of its proper divisors (35099).

70191001 is a wasteful number, since it uses less digits than its factorization.

70191001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35098.

The product of its (nonzero) digits is 63, while the sum is 19.

The square root of 70191001 is about 8378.0069825705. The cubic root of 70191001 is about 412.5030322397.

The spelling of 70191001 in words is "seventy million, one hundred ninety-one thousand, one".