71897803 has 4 divisors (see below), whose sum is σ = 71931760. Its totient is φ = 71863848.

The previous prime is 71897801. The next prime is 71897807. The reversal of 71897803 is 30879817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30879817 = 71 ⋅434927.

It is a cyclic number.

It is not a de Polignac number, because 71897803 - 2¹ = 71897801 is a prime.

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 71897803.

It is not an unprimeable number, because it can be changed into a prime (71897801) 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, 13575 + ... + 18112.

It is an arithmetic number, because the mean of its divisors is an integer number (17982940).

Almost surely, 2^71897803 is an apocalyptic number.

71897803 is a deficient number, since it is larger than the sum of its proper divisors (33957).

71897803 is a wasteful number, since it uses less digits than its factorization.

71897803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33956.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 71897803 is about 8479.2572198277. The cubic root of 71897803 is about 415.8198396253.

The spelling of 71897803 in words is "seventy-one million, eight hundred ninety-seven thousand, eight hundred three".