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87367431 = 329122477
BaseRepresentation
bin1010011010100…
…01111100000111
320002101201120210
411031101330013
5134331224211
612400330503
72110416354
oct515217407
9202351523
1087367431
1145353498
1225313a33
131513c908
14b86362b
157a0b9a6
hex5351f07

87367431 has 4 divisors (see below), whose sum is σ = 116489912. Its totient is φ = 58244952.

The previous prime is 87367429. The next prime is 87367439. The reversal of 87367431 is 13476378.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 87367431 - 21 = 87367429 is a prime.

It is a super-2 number, since 2×873674312 = 15266135999079522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87367431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87367439) 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, 14561236 + ... + 14561241.

It is an arithmetic number, because the mean of its divisors is an integer number (29122478).

Almost surely, 287367431 is an apocalyptic number.

87367431 is a deficient number, since it is larger than the sum of its proper divisors (29122481).

87367431 is a wasteful number, since it uses less digits than its factorization.

87367431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29122480.

The product of its digits is 84672, while the sum is 39.

The square root of 87367431 is about 9347.0546697877. The cubic root of 87367431 is about 443.7276807924.

The spelling of 87367431 in words is "eighty-seven million, three hundred sixty-seven thousand, four hundred thirty-one".

Divisors: 1 3 29122477 87367431