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137680418 = 282972
BaseRepresentation
bin10000011010011…
…01011000100010
3100121001220000202
420031031120202
5240221233133
621354545202
73261156431
oct1015153042
9317056022
10137680418
1170798377
123a138202
13226a7605
14143dd118
15c1492e8
hex834d622

137680418 has 6 divisors (see below), whose sum is σ = 206545521. Its totient is φ = 68831912.

The previous prime is 137680397. The next prime is 137680451. The reversal of 137680418 is 814086731.

It can be written as a sum of positive squares in 2 ways, for example, as 80874049 + 56806369 = 8993^2 + 7537^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=8297.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12446 + ... + 20742.

Almost surely, 2137680418 is an apocalyptic number.

137680418 is a deficient number, since it is larger than the sum of its proper divisors (68865103).

137680418 is an frugal number, since it uses more digits than its factorization.

137680418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16596 (or 8299 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 137680418 is about 11733.7299270096. The cubic root of 137680418 is about 516.3657068376.

The spelling of 137680418 in words is "one hundred thirty-seven million, six hundred eighty thousand, four hundred eighteen".

Divisors: 1 2 8297 16594 68840209 137680418