70111691 has 16 divisors (see below), whose sum is σ = 79796640. Its totient is φ = 61067520.

The previous prime is 70111673. The next prime is 70111693. The reversal of 70111691 is 19611107.

It is not a de Polignac number, because 70111691 - 2¹⁴ = 70095307 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 70111691.

It is not an unprimeable number, because it can be changed into a prime (70111693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91751 + ... + 92511.

It is an arithmetic number, because the mean of its divisors is an integer number (4987290).

Almost surely, 2^70111691 is an apocalyptic number.

70111691 is a deficient number, since it is larger than the sum of its proper divisors (9684949).

70111691 is a wasteful number, since it uses less digits than its factorization.

70111691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166.

The product of its (nonzero) digits is 378, while the sum is 26.

The square root of 70111691 is about 8373.2724188336. The cubic root of 70111691 is about 412.3476089673.

Adding to 70111691 its reverse (19611107), we get a palindrome (89722798).

The spelling of 70111691 in words is "seventy million, one hundred eleven thousand, six hundred ninety-one".