Search a number
BaseRepresentation
bin10000100010111…
…01011000001011
3100200011111021022
420101131120023
5241012411012
621434503055
73303506465
oct1021353013
9320144238
10138794507
1171389405
123a594a8b
13229a7737
141460d135
15c2b9472
hex845d60b

138794507 has 2 divisors, whose sum is σ = 138794508. Its totient is φ = 138794506.

The previous prime is 138794473. The next prime is 138794567. The reversal of 138794507 is 705497831.

It is a weak prime.

It is an emirp because it is prime and its reverse (705497831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138794507 - 216 = 138728971 is a prime.

It is not a weakly prime, because it can be changed into another prime (138794567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69397253 + 69397254.

It is an arithmetic number, because the mean of its divisors is an integer number (69397254).

Almost surely, 2138794507 is an apocalyptic number.

138794507 is a deficient number, since it is larger than the sum of its proper divisors (1).

138794507 is an equidigital number, since it uses as much as digits as its factorization.

138794507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 138794507 is about 11781.1080548478. The cubic root of 138794507 is about 517.7547511545.

The spelling of 138794507 in words is "one hundred thirty-eight million, seven hundred ninety-four thousand, five hundred seven".