138164090 has 8 divisors (see below), whose sum is σ = 248695380. Its totient is φ = 55265632.

The previous prime is 138164087. The next prime is 138164099. The reversal of 138164090 is 90461831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 114554209 + 23609881 = 10703^2 + 4859^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (138164099) 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, 6908195 + ... + 6908214.

Almost surely, 2^138164090 is an apocalyptic number.

138164090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138164090 is a deficient number, since it is larger than the sum of its proper divisors (110531290).

138164090 is a wasteful number, since it uses less digits than its factorization.

138164090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13816416.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 138164090 is about 11754.3221837756. The cubic root of 138164090 is about 516.9696652597.

The spelling of 138164090 in words is "one hundred thirty-eight million, one hundred sixty-four thousand, ninety".