139499329 has 4 divisors (see below), whose sum is σ = 139566276. Its totient is φ = 139432384.

The previous prime is 139499317. The next prime is 139499341. The reversal of 139499329 is 923994931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 923994931 = 17 ⋅54352643.

It is an interprime number because it is at equal distance from previous prime (139499317) and next prime (139499341).

It can be written as a sum of positive squares in 2 ways, for example, as 73564929 + 65934400 = 8577^2 + 8120^2 .

It is a cyclic number.

It is not a de Polignac number, because 139499329 - 2⁷ = 139499201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139499029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30244 + ... + 34549.

It is an arithmetic number, because the mean of its divisors is an integer number (34891569).

Almost surely, 2^139499329 is an apocalyptic number.

It is an amenable number.

139499329 is a deficient number, since it is larger than the sum of its proper divisors (66947).

139499329 is an equidigital number, since it uses as much as digits as its factorization.

139499329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66946.

The product of its digits is 472392, while the sum is 49.

The square root of 139499329 is about 11810.9834052885. The cubic root of 139499329 is about 518.6296872189.

The spelling of 139499329 in words is "one hundred thirty-nine million, four hundred ninety-nine thousand, three hundred twenty-nine".