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13638977 = 1123313747
BaseRepresentation
bin110100000001…
…110101000001
3221122221011022
4310001311001
511442421402
61204155225
7223633532
oct64016501
927587138
1013638977
117776190
124698b15
132a97001
141b50689
1512e62a2
hexd01d41

13638977 has 32 divisors (see below), whose sum is σ = 16809984. Its totient is φ = 10929600.

The previous prime is 13638943. The next prime is 13638991. The reversal of 13638977 is 77983631.

It is not a de Polignac number, because 13638977 - 220 = 12590401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13638907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 290168 + ... + 290214.

It is an arithmetic number, because the mean of its divisors is an integer number (525312).

Almost surely, 213638977 is an apocalyptic number.

It is an amenable number.

13638977 is a deficient number, since it is larger than the sum of its proper divisors (3171007).

13638977 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (13638976) it forms an eRAP, since the sums of their prime factors are consecutive (148 and 149).

13638977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149.

The product of its digits is 190512, while the sum is 44.

The square root of 13638977 is about 3693.0985635371. The cubic root of 13638977 is about 238.9244522340.

The spelling of 13638977 in words is "thirteen million, six hundred thirty-eight thousand, nine hundred seventy-seven".

Divisors: 1 11 23 31 37 47 253 341 407 517 713 851 1081 1147 1457 1739 7843 9361 11891 12617 16027 19129 26381 33511 39997 53909 290191 368621 439967 592999 1239907 13638977