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71634157 = 747217733
BaseRepresentation
bin1000100010100…
…00110011101101
311222210101120221
410101100303231
5121314243112
611035211341
71526610640
oct421206355
9158711527
1071634157
1137487891
121bba6b51
1311ac159a
149729a57
15644ee07
hex4450ced

71634157 has 8 divisors (see below), whose sum is σ = 83609856. Its totient is φ = 60094032.

The previous prime is 71634133. The next prime is 71634169. The reversal of 71634157 is 75143617.

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 71634157 - 219 = 71109869 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 (71634187) 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, 108538 + ... + 109195.

It is an arithmetic number, because the mean of its divisors is an integer number (10451232).

Almost surely, 271634157 is an apocalyptic number.

It is an amenable number.

71634157 is a deficient number, since it is larger than the sum of its proper divisors (11975699).

71634157 is a wasteful number, since it uses less digits than its factorization.

71634157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217787.

The product of its digits is 17640, while the sum is 34.

The square root of 71634157 is about 8463.6964146879. The cubic root of 71634157 is about 415.3109528984.

The spelling of 71634157 in words is "seventy-one million, six hundred thirty-four thousand, one hundred fifty-seven".

Divisors: 1 7 47 329 217733 1524131 10233451 71634157