71992801 has 4 divisors (see below), whose sum is σ = 72010692. Its totient is φ = 71974912.

The previous prime is 71992799. The next prime is 71992849. The reversal of 71992801 is 10829917.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10829917 = 7 ⋅1547131.

It can be written as a sum of positive squares in 2 ways, for example, as 45212176 + 26780625 = 6724^2 + 5175^2 .

It is a cyclic number.

It is not a de Polignac number, because 71992801 - 2¹ = 71992799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71992601) 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, 225 + ... + 12001.

It is an arithmetic number, because the mean of its divisors is an integer number (18002673).

Almost surely, 2^71992801 is an apocalyptic number.

It is an amenable number.

71992801 is a deficient number, since it is larger than the sum of its proper divisors (17891).

71992801 is a wasteful number, since it uses less digits than its factorization.

71992801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17890.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 71992801 is about 8484.8571584912. The cubic root of 71992801 is about 416.0028988488.

It can be divided in two parts, 7199 and 2801, that added together give a 4-th power (10000 = 10⁴).

The spelling of 71992801 in words is "seventy-one million, nine hundred ninety-two thousand, eight hundred one".