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87208413 = 329069471
BaseRepresentation
bin1010011001010…
…11000111011101
320002002122110020
411030223013131
5134311132123
612353102353
72106154635
oct514530735
9202078406
1087208413
1145254a76
12252579b9
13150b5416
14b8216c5
1579c97e3
hex532b1dd

87208413 has 4 divisors (see below), whose sum is σ = 116277888. Its totient is φ = 58138940.

The previous prime is 87208411. The next prime is 87208421. The reversal of 87208413 is 31480278.

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.

It is a cyclic number.

It is not a de Polignac number, because 87208413 - 21 = 87208411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87208411) 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, 14534733 + ... + 14534738.

It is an arithmetic number, because the mean of its divisors is an integer number (29069472).

Almost surely, 287208413 is an apocalyptic number.

It is an amenable number.

87208413 is a deficient number, since it is larger than the sum of its proper divisors (29069475).

87208413 is a wasteful number, since it uses less digits than its factorization.

87208413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29069474.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 87208413 is about 9338.5444797356. The cubic root of 87208413 is about 443.4583068003.

The spelling of 87208413 in words is "eighty-seven million, two hundred eight thousand, four hundred thirteen".

Divisors: 1 3 29069471 87208413