70111391 has 8 divisors (see below), whose sum is σ = 80332320. Its totient is φ = 59941728.

The previous prime is 70111381. The next prime is 70111397. The reversal of 70111391 is 19311107.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-70111391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70111397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9836 + ... + 15393.

It is an arithmetic number, because the mean of its divisors is an integer number (10041540).

Almost surely, 2^70111391 is an apocalyptic number.

70111391 is a deficient number, since it is larger than the sum of its proper divisors (10220929).

70111391 is a wasteful number, since it uses less digits than its factorization.

70111391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25633.

The product of its (nonzero) digits is 189, while the sum is 23.

The square root of 70111391 is about 8373.2545046714. The cubic root of 70111391 is about 412.3470208369.

Adding to 70111391 its reverse (19311107), we get a palindrome (89422498).

The spelling of 70111391 in words is "seventy million, one hundred eleven thousand, three hundred ninety-one".