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90137017 = 293108173
BaseRepresentation
bin1010101111101…
…10000110111001
320021121102202001
411113312012321
5141033341032
612535541001
72143103065
oct527660671
9207542661
1090137017
1146975303
122622a761
131589c419
14bd84aa5
157da73e7
hex55f61b9

90137017 has 4 divisors (see below), whose sum is σ = 93245220. Its totient is φ = 87028816.

The previous prime is 90136999. The next prime is 90137027. The reversal of 90137017 is 71073109.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71073109 = 431652863.

It can be written as a sum of positive squares in 2 ways, for example, as 77633721 + 12503296 = 8811^2 + 3536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-90137017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90137027) 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, 1554058 + ... + 1554115.

It is an arithmetic number, because the mean of its divisors is an integer number (23311305).

Almost surely, 290137017 is an apocalyptic number.

It is an amenable number.

90137017 is a deficient number, since it is larger than the sum of its proper divisors (3108203).

90137017 is a wasteful number, since it uses less digits than its factorization.

90137017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108202.

The product of its (nonzero) digits is 1323, while the sum is 28.

The square root of 90137017 is about 9494.0516640684. The cubic root of 90137017 is about 448.3677773580.

The spelling of 90137017 in words is "ninety million, one hundred thirty-seven thousand, seventeen".

Divisors: 1 29 3108173 90137017