139459453 has 4 divisors (see below), whose sum is σ = 159382240. Its totient is φ = 119536668.

The previous prime is 139459451. The next prime is 139459469. The reversal of 139459453 is 354954931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 354954931 = 997 ⋅356023.

It is a cyclic number.

It is not a de Polignac number, because 139459453 - 2¹ = 139459451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139459451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9961383 + ... + 9961396.

It is an arithmetic number, because the mean of its divisors is an integer number (39845560).

Almost surely, 2^139459453 is an apocalyptic number.

It is an amenable number.

139459453 is a deficient number, since it is larger than the sum of its proper divisors (19922787).

139459453 is an equidigital number, since it uses as much as digits as its factorization.

139459453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19922786.

The product of its digits is 291600, while the sum is 43.

The square root of 139459453 is about 11809.2951948878. The cubic root of 139459453 is about 518.5802655995.

The spelling of 139459453 in words is "one hundred thirty-nine million, four hundred fifty-nine thousand, four hundred fifty-three".