71903133 has 10 divisors (see below), whose sum is σ = 107410974. Its totient is φ = 47935368.

The previous prime is 71903119. The next prime is 71903137. The reversal of 71903133 is 33130917.

It can be written as a sum of positive squares in only one way, i.e., 50168889 + 21734244 = 7083^2 + 4662^2 .

It is not a de Polignac number, because 71903133 - 2¹⁷ = 71772061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 71903097 and 71903106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71903137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 443766 + ... + 443927.

Almost surely, 2^71903133 is an apocalyptic number.

It is an amenable number.

71903133 is a deficient number, since it is larger than the sum of its proper divisors (35507841).

71903133 is an equidigital number, since it uses as much as digits as its factorization.

71903133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887705 (or 887696 counting only the distinct ones).

The product of its (nonzero) digits is 1701, while the sum is 27.

The square root of 71903133 is about 8479.5715104007. The cubic root of 71903133 is about 415.8301146957.

The spelling of 71903133 in words is "seventy-one million, nine hundred three thousand, one hundred thirty-three".