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71072033 = 1091733769
BaseRepresentation
bin1000011110001…
…11100100100001
311221201211111112
410033013210201
5121143301113
611015153105
71522050044
oct417074441
9157654445
1071072033
113713351a
121b975795
1311955776
149620c5b
15638d5a8
hex43c7921

71072033 has 8 divisors (see below), whose sum is σ = 72157800. Its totient is φ = 69994368.

The previous prime is 71072017. The next prime is 71072041. The reversal of 71072033 is 33027017.

It can be written as a sum of positive squares in 4 ways, for example, as 44528929 + 26543104 = 6673^2 + 5152^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71072033 - 24 = 71072017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71072333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16973 + ... + 20741.

It is an arithmetic number, because the mean of its divisors is an integer number (9019725).

Almost surely, 271072033 is an apocalyptic number.

It is an amenable number.

71072033 is a deficient number, since it is larger than the sum of its proper divisors (1085767).

71072033 is a wasteful number, since it uses less digits than its factorization.

71072033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4051.

The product of its (nonzero) digits is 882, while the sum is 23.

The square root of 71072033 is about 8430.4230617449. The cubic root of 71072033 is about 414.2217630691.

The spelling of 71072033 in words is "seventy-one million, seventy-two thousand, thirty-three".

Divisors: 1 109 173 3769 18857 410821 652037 71072033