138995465 has 8 divisors (see below), whose sum is σ = 190622400. Its totient is φ = 95311152.

The previous prime is 138995459. The next prime is 138995473. The reversal of 138995465 is 564599831.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 138995465 - 2¹⁰ = 138994441 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 1985615 + ... + 1985684.

It is an arithmetic number, because the mean of its divisors is an integer number (23827800).

Almost surely, 2^138995465 is an apocalyptic number.

It is an amenable number.

138995465 is a deficient number, since it is larger than the sum of its proper divisors (51626935).

138995465 is an equidigital number, since it uses as much as digits as its factorization.

138995465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971311.

The product of its digits is 1166400, while the sum is 50.

The square root of 138995465 is about 11789.6337941431. The cubic root of 138995465 is about 518.0045131611.

The spelling of 138995465 in words is "one hundred thirty-eight million, nine hundred ninety-five thousand, four hundred sixty-five".