71073811 has 4 divisors (see below), whose sum is σ = 71763952. Its totient is φ = 70383672.

The previous prime is 71073803. The next prime is 71073817. The reversal of 71073811 is 11837017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11837017 = 29 ⋅408173.

It is a cyclic number.

It is not a de Polignac number, because 71073811 - 2³ = 71073803 is a prime.

It is a super-2 number, since 2×71073811² = 10102973220127442, which contains 22 as substring.

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 71073811.

It is not an unprimeable number, because it can be changed into a prime (71073817) 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, 344916 + ... + 345121.

It is an arithmetic number, because the mean of its divisors is an integer number (17940988).

Almost surely, 2^71073811 is an apocalyptic number.

71073811 is a deficient number, since it is larger than the sum of its proper divisors (690141).

71073811 is a wasteful number, since it uses less digits than its factorization.

71073811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690140.

The product of its (nonzero) digits is 1176, while the sum is 28.

The square root of 71073811 is about 8430.5285124955. The cubic root of 71073811 is about 414.2252172180.

The spelling of 71073811 in words is "seventy-one million, seventy-three thousand, eight hundred eleven".