870070191 has 4 divisors (see below), whose sum is σ = 1160093592. Its totient is φ = 580046792.

The previous prime is 870070171. The next prime is 870070193. The reversal of 870070191 is 191070078.

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

It is a cyclic number.

It is not a de Polignac number, because 870070191 - 2¹⁸ = 869808047 is a prime.

It is a super-3 number, since 3×870070191³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870070193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145011696 + ... + 145011701.

It is an arithmetic number, because the mean of its divisors is an integer number (290023398).

Almost surely, 2^870070191 is an apocalyptic number.

870070191 is a deficient number, since it is larger than the sum of its proper divisors (290023401).

870070191 is a wasteful number, since it uses less digits than its factorization.

870070191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290023400.

The product of its (nonzero) digits is 3528, while the sum is 33.

The square root of 870070191 is about 29496.9522323917. The cubic root of 870070191 is about 954.6659434852.

The spelling of 870070191 in words is "eight hundred seventy million, seventy thousand, one hundred ninety-one".