71064899 has 4 divisors (see below), whose sum is σ = 71081760. Its totient is φ = 71048040.

The previous prime is 71064887. The next prime is 71064907. The reversal of 71064899 is 99846017.

It is a Cunningham number, because it is equal to 8430²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 99846017 = 37 ⋅2698541.

It is a cyclic number.

It is not a de Polignac number, because 71064899 - 2¹⁶ = 70999363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71064859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4214 + ... + 12644.

It is an arithmetic number, because the mean of its divisors is an integer number (17770440).

Almost surely, 2^71064899 is an apocalyptic number.

71064899 is a deficient number, since it is larger than the sum of its proper divisors (16861).

71064899 is an equidigital number, since it uses as much as digits as its factorization.

71064899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16860.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 71064899 is about 8429.9999406880. Note that the first 4 decimals coincide. The cubic root of 71064899 is about 414.2079031544.

The spelling of 71064899 in words is "seventy-one million, sixty-four thousand, eight hundred ninety-nine".