70640111 has 2 divisors, whose sum is σ = 70640112. Its totient is φ = 70640110.

The previous prime is 70640093. The next prime is 70640113. The reversal of 70640111 is 11104607.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70640111 - 2²⁶ = 3531247 is a prime.

Together with 70640113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70640113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35320055 + 35320056.

It is an arithmetic number, because the mean of its divisors is an integer number (35320056).

Almost surely, 2^70640111 is an apocalyptic number.

70640111 is a deficient number, since it is larger than the sum of its proper divisors (1).

70640111 is an equidigital number, since it uses as much as digits as its factorization.

70640111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 70640111 is about 8404.7671591782. The cubic root of 70640111 is about 413.3809487434.

Adding to 70640111 its reverse (11104607), we get a palindrome (81744718).

The spelling of 70640111 in words is "seventy million, six hundred forty thousand, one hundred eleven".