71898193 has 4 divisors (see below), whose sum is σ = 73570288. Its totient is φ = 70226100.

The previous prime is 71898191. The next prime is 71898209. The reversal of 71898193 is 39189817.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39189817 = 29 ⋅1351373.

It is a cyclic number.

It is not a de Polignac number, because 71898193 - 2¹ = 71898191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71898191) 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, 835983 + ... + 836068.

It is an arithmetic number, because the mean of its divisors is an integer number (18392572).

Almost surely, 2^71898193 is an apocalyptic number.

It is an amenable number.

71898193 is a deficient number, since it is larger than the sum of its proper divisors (1672095).

71898193 is a wasteful number, since it uses less digits than its factorization.

71898193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672094.

The product of its digits is 108864, while the sum is 46.

The square root of 71898193 is about 8479.2802170939. The cubic root of 71898193 is about 415.8205914769.

The spelling of 71898193 in words is "seventy-one million, eight hundred ninety-eight thousand, one hundred ninety-three".