71007899 has 4 divisors (see below), whose sum is σ = 71433264. Its totient is φ = 70582536.

The previous prime is 71007869. The next prime is 71007907. The reversal of 71007899 is 99870017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99870017 = 13 ⋅7682309.

It is a cyclic number.

It is not a de Polignac number, because 71007899 - 2¹⁶ = 70942363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71007809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212432 + ... + 212765.

It is an arithmetic number, because the mean of its divisors is an integer number (17858316).

Almost surely, 2^71007899 is an apocalyptic number.

71007899 is a deficient number, since it is larger than the sum of its proper divisors (425365).

71007899 is a wasteful number, since it uses less digits than its factorization.

71007899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425364.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 71007899 is about 8426.6184795563. The cubic root of 71007899 is about 414.0971303913.

The spelling of 71007899 in words is "seventy-one million, seven thousand, eight hundred ninety-nine".