138234473 has 16 divisors (see below), whose sum is σ = 152845056. Its totient is φ = 124222080.

The previous prime is 138234469. The next prime is 138234491. The reversal of 138234473 is 374432831.

It is a cyclic number.

It is not a de Polignac number, because 138234473 - 2² = 138234469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138234403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141878 + ... + 142848.

It is an arithmetic number, because the mean of its divisors is an integer number (9552816).

Almost surely, 2^138234473 is an apocalyptic number.

138234473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

138234473 is a deficient number, since it is larger than the sum of its proper divisors (14610583).

138234473 is a wasteful number, since it uses less digits than its factorization.

138234473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264.

The product of its digits is 48384, while the sum is 35.

The square root of 138234473 is about 11757.3157225618. The cubic root of 138234473 is about 517.0574345664.

The spelling of 138234473 in words is "one hundred thirty-eight million, two hundred thirty-four thousand, four hundred seventy-three".