71520899 has 2 divisors, whose sum is σ = 71520900. Its totient is φ = 71520898.

The previous prime is 71520877. The next prime is 71520901. The reversal of 71520899 is 99802517.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71520899 - 2²⁰ = 70472323 is a prime.

Together with 71520901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71520809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35760449 + 35760450.

It is an arithmetic number, because the mean of its divisors is an integer number (35760450).

Almost surely, 2^71520899 is an apocalyptic number.

71520899 is a deficient number, since it is larger than the sum of its proper divisors (1).

71520899 is an equidigital number, since it uses as much as digits as its factorization.

71520899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 71520899 is about 8457.0029561305. The cubic root of 71520899 is about 415.0919600729.

The spelling of 71520899 in words is "seventy-one million, five hundred twenty thousand, eight hundred ninety-nine".