138896546 has 4 divisors (see below), whose sum is σ = 208344822. Its totient is φ = 69448272.

The previous prime is 138896543. The next prime is 138896581. The reversal of 138896546 is 645698831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 96138025 + 42758521 = 9805^2 + 6539^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 138896494 and 138896503.

It is not an unprimeable number, because it can be changed into a prime (138896543) by changing a digit.

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 as a sum of consecutive naturals, namely, 34724135 + ... + 34724138.

Almost surely, 2^138896546 is an apocalyptic number.

138896546 is a deficient number, since it is larger than the sum of its proper divisors (69448276).

138896546 is an equidigital number, since it uses as much as digits as its factorization.

138896546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69448275.

The product of its digits is 1244160, while the sum is 50.

The square root of 138896546 is about 11785.4378790098. The cubic root of 138896546 is about 517.8816011206.

The spelling of 138896546 in words is "one hundred thirty-eight million, eight hundred ninety-six thousand, five hundred forty-six".