70911811 has 4 divisors (see below), whose sum is σ = 75083112. Its totient is φ = 66740512.

The previous prime is 70911791. The next prime is 70911833. The reversal of 70911811 is 11811907.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11811907 = 919 ⋅12853.

It is a cyclic number.

It is not a de Polignac number, because 70911811 - 2⁵ = 70911779 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 70911811.

It is not an unprimeable number, because it can be changed into a prime (70911881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2085625 + ... + 2085658.

It is an arithmetic number, because the mean of its divisors is an integer number (18770778).

Almost surely, 2^70911811 is an apocalyptic number.

70911811 is a deficient number, since it is larger than the sum of its proper divisors (4171301).

70911811 is a wasteful number, since it uses less digits than its factorization.

70911811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171300.

The product of its (nonzero) digits is 504, while the sum is 28.

The square root of 70911811 is about 8420.9150927913. The cubic root of 70911811 is about 413.9102604469.

The spelling of 70911811 in words is "seventy million, nine hundred eleven thousand, eight hundred eleven".