138465494 has 4 divisors (see below), whose sum is σ = 207698244. Its totient is φ = 69232746.

The previous prime is 138465479. The next prime is 138465511. The reversal of 138465494 is 494564831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 494564831 = 811 ⋅609821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34616372 + ... + 34616375.

It is an arithmetic number, because the mean of its divisors is an integer number (51924561).

Almost surely, 2^138465494 is an apocalyptic number.

138465494 is a deficient number, since it is larger than the sum of its proper divisors (69232750).

138465494 is an equidigital number, since it uses as much as digits as its factorization.

138465494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69232749.

The product of its digits is 414720, while the sum is 44.

The square root of 138465494 is about 11767.1361851557. The cubic root of 138465494 is about 517.3453141415.

The spelling of 138465494 in words is "one hundred thirty-eight million, four hundred sixty-five thousand, four hundred ninety-four".