139497 has 4 divisors (see below), whose sum is σ = 186000. Its totient is φ = 92996.

The previous prime is 139493. The next prime is 139501. The reversal of 139497 is 794931.

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: 794931 = 3 ⋅264977.

It is an interprime number because it is at equal distance from previous prime (139493) and next prime (139501).

It is a cyclic number.

It is not a de Polignac number, because 139497 - 2² = 139493 is a prime.

It is a D-number.

139497 is a lucky number.

It is a plaindrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139497.

It is not an unprimeable number, because it can be changed into a prime (139493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23247 + ... + 23252.

It is an arithmetic number, because the mean of its divisors is an integer number (46500).

2¹³⁹⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

139497 is a deficient number, since it is larger than the sum of its proper divisors (46503).

139497 is an equidigital number, since it uses as much as digits as its factorization.

139497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46502.

The product of its digits is 6804, while the sum is 33.

The square root of 139497 is about 373.4929718214. The cubic root of 139497 is about 51.8626800956.

It can be divided in two parts, 139 and 497, that added together give a palindrome (636).

The spelling of 139497 in words is "one hundred thirty-nine thousand, four hundred ninety-seven".