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135890649 = 335032987
BaseRepresentation
bin10000001100110…
…00011011011001
3100110200221221000
420012120123121
5234242000044
621252335213
73240023436
oct1006303331
9313627830
10135890649
116a785724
1239614509
13221cba8b
1414094b8d
15bde3d69
hex81986d9

135890649 has 8 divisors (see below), whose sum is σ = 201319520. Its totient is φ = 90593748.

The previous prime is 135890617. The next prime is 135890653. The reversal of 135890649 is 946098531.

It is a happy number.

135890649 is a `hidden beast` number, since 1 + 3 + 589 + 0 + 64 + 9 = 666.

It is not a de Polignac number, because 135890649 - 25 = 135890617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135892649) 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, 2516467 + ... + 2516520.

It is an arithmetic number, because the mean of its divisors is an integer number (25164940).

Almost surely, 2135890649 is an apocalyptic number.

It is an amenable number.

135890649 is a deficient number, since it is larger than the sum of its proper divisors (65428871).

135890649 is an equidigital number, since it uses as much as digits as its factorization.

135890649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032996 (or 5032990 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 135890649 is about 11657.2144614397. The cubic root of 135890649 is about 514.1184516582.

The spelling of 135890649 in words is "one hundred thirty-five million, eight hundred ninety thousand, six hundred forty-nine".

Divisors: 1 3 9 27 5032987 15098961 45296883 135890649