139285489 has 12 divisors (see below), whose sum is σ = 164775600. Its totient is φ = 117361608.

The previous prime is 139285483. The next prime is 139285499. The reversal of 139285489 is 984582931.

139285489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139285489 - 2⁷ = 139285361 is a prime.

It is a super-4 number, since 4×139285489⁴ (a number of 34 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139285483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21199 + ... + 26980.

It is an arithmetic number, because the mean of its divisors is an integer number (13731300).

Almost surely, 2^139285489 is an apocalyptic number.

It is an amenable number.

139285489 is a deficient number, since it is larger than the sum of its proper divisors (25490111).

139285489 is an equidigital number, since it uses as much as digits as its factorization.

139285489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48252 (or 48245 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 139285489 is about 11801.9273425996. The cubic root of 139285489 is about 518.3645473793.

The spelling of 139285489 in words is "one hundred thirty-nine million, two hundred eighty-five thousand, four hundred eighty-nine".