71897273 has 16 divisors (see below), whose sum is σ = 87400320. Its totient is φ = 57770496.

The previous prime is 71897269. The next prime is 71897281. The reversal of 71897273 is 37279817.

It is not a de Polignac number, because 71897273 - 2² = 71897269 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71896273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10115 + ... + 15687.

It is an arithmetic number, because the mean of its divisors is an integer number (5462520).

Almost surely, 2^71897273 is an apocalyptic number.

It is an amenable number.

71897273 is a deficient number, since it is larger than the sum of its proper divisors (15503047).

71897273 is a wasteful number, since it uses less digits than its factorization.

71897273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5696.

The product of its digits is 148176, while the sum is 44.

The square root of 71897273 is about 8479.2259670326. The cubic root of 71897273 is about 415.8188178738.

The spelling of 71897273 in words is "seventy-one million, eight hundred ninety-seven thousand, two hundred seventy-three".