138409754 has 8 divisors (see below), whose sum is σ = 237273888. Its totient is φ = 59318460.

The previous prime is 138409741. The next prime is 138409763. The reversal of 138409754 is 457904831.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4943192 + ... + 4943219.

It is an arithmetic number, because the mean of its divisors is an integer number (29659236).

Almost surely, 2^138409754 is an apocalyptic number.

138409754 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138409754 is a deficient number, since it is larger than the sum of its proper divisors (98864134).

138409754 is an equidigital number, since it uses as much as digits as its factorization.

138409754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9886420.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 138409754 is about 11764.7674860152. The cubic root of 138409754 is about 517.2758848146.

The spelling of 138409754 in words is "one hundred thirty-eight million, four hundred nine thousand, seven hundred fifty-four".