139553 has 4 divisors (see below), whose sum is σ = 147780. Its totient is φ = 131328.

The previous prime is 139547. The next prime is 139571. The reversal of 139553 is 355931.

139553 = T₄₇ + T₄₈ + ... + T₉₇.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355931 = 47 ⋅7573.

It can be written as a sum of positive squares in 2 ways, for example, as 54289 + 85264 = 233^2 + 292^2 .

It is a cyclic number.

It is not a de Polignac number, because 139553 - 2⁴ = 139537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4088 + ... + 4121.

It is an arithmetic number, because the mean of its divisors is an integer number (36945).

2¹³⁹⁵⁵³ is an apocalyptic number.

It is an amenable number.

139553 is a deficient number, since it is larger than the sum of its proper divisors (8227).

139553 is an equidigital number, since it uses as much as digits as its factorization.

139553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8226.

The product of its digits is 2025, while the sum is 26.

The square root of 139553 is about 373.5679322426. The cubic root of 139553 is about 51.8696191254.

It can be divided in two parts, 139 and 553, that multiplied together give a palindrome (76867).

The spelling of 139553 in words is "one hundred thirty-nine thousand, five hundred fifty-three".