139853489 has 4 divisors (see below), whose sum is σ = 140397924. Its totient is φ = 139309056.

The previous prime is 139853453. The next prime is 139853491. The reversal of 139853489 is 984358931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 984358931 = 20543 ⋅47917.

It can be written as a sum of positive squares in 2 ways, for example, as 129504400 + 10349089 = 11380^2 + 3217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139853489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139853429) 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, 271832 + ... + 272345.

It is an arithmetic number, because the mean of its divisors is an integer number (35099481).

Almost surely, 2^139853489 is an apocalyptic number.

It is an amenable number.

139853489 is a deficient number, since it is larger than the sum of its proper divisors (544435).

139853489 is an equidigital number, since it uses as much as digits as its factorization.

139853489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544434.

The product of its digits is 933120, while the sum is 50.

The square root of 139853489 is about 11825.9667258115. The cubic root of 139853489 is about 519.0682142239.

The spelling of 139853489 in words is "one hundred thirty-nine million, eight hundred fifty-three thousand, four hundred eighty-nine".