71428193 has 4 divisors (see below), whose sum is σ = 71472660. Its totient is φ = 71383728.

The previous prime is 71428183. The next prime is 71428207. The reversal of 71428193 is 39182417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39182417 = 43 ⋅911219.

It can be written as a sum of positive squares in 2 ways, for example, as 56896849 + 14531344 = 7543^2 + 3812^2 .

It is a cyclic number.

It is not a de Polignac number, because 71428193 - 2⁶ = 71428129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71428183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19730 + ... + 23067.

It is an arithmetic number, because the mean of its divisors is an integer number (17868165).

Almost surely, 2^71428193 is an apocalyptic number.

It is an amenable number.

71428193 is a deficient number, since it is larger than the sum of its proper divisors (44467).

71428193 is a wasteful number, since it uses less digits than its factorization.

71428193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44466.

The product of its digits is 12096, while the sum is 35.

The square root of 71428193 is about 8451.5201591193. The cubic root of 71428193 is about 414.9125339450.

The spelling of 71428193 in words is "seventy-one million, four hundred twenty-eight thousand, one hundred ninety-three".