71899733 has 4 divisors (see below), whose sum is σ = 72055488. Its totient is φ = 71743980.

The previous prime is 71899697. The next prime is 71899739. The reversal of 71899733 is 33799817.

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: 33799817 = 277 ⋅122021.

It is a cyclic number.

It is not a de Polignac number, because 71899733 - 2¹⁸ = 71637589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71899739) 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, 77183 + ... + 78108.

It is an arithmetic number, because the mean of its divisors is an integer number (18013872).

Almost surely, 2^71899733 is an apocalyptic number.

It is an amenable number.

71899733 is a deficient number, since it is larger than the sum of its proper divisors (155755).

71899733 is a wasteful number, since it uses less digits than its factorization.

71899733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155754.

The product of its digits is 285768, while the sum is 47.

The square root of 71899733 is about 8479.3710262024. The cubic root of 71899733 is about 415.8235603004.

The spelling of 71899733 in words is "seventy-one million, eight hundred ninety-nine thousand, seven hundred thirty-three".