70188971 has 4 divisors (see below), whose sum is σ = 74317752. Its totient is φ = 66060192.

The previous prime is 70188959. The next prime is 70188977. The reversal of 70188971 is 17988107.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17988107 = 61 ⋅294887.

It is a cyclic number.

It is not a de Polignac number, because 70188971 - 2¹⁴ = 70172587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70188977) 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, 2064365 + ... + 2064398.

It is an arithmetic number, because the mean of its divisors is an integer number (18579438).

Almost surely, 2^70188971 is an apocalyptic number.

70188971 is a deficient number, since it is larger than the sum of its proper divisors (4128781).

70188971 is a wasteful number, since it uses less digits than its factorization.

70188971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128780.

The product of its (nonzero) digits is 28224, while the sum is 41.

The square root of 70188971 is about 8377.8858311629. The cubic root of 70188971 is about 412.4990555228.

The spelling of 70188971 in words is "seventy million, one hundred eighty-eight thousand, nine hundred seventy-one".