139001389 has 4 divisors (see below), whose sum is σ = 139922080. Its totient is φ = 138080700.

The previous prime is 139001377. The next prime is 139001399. The reversal of 139001389 is 983100931.

139001389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 139001389 - 2¹⁷ = 138870317 is a prime.

It is a super-2 number, since 2×139001389² = 38642772287858642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139001339) 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, 460119 + ... + 460420.

It is an arithmetic number, because the mean of its divisors is an integer number (34980520).

Almost surely, 2^139001389 is an apocalyptic number.

It is an amenable number.

139001389 is a deficient number, since it is larger than the sum of its proper divisors (920691).

139001389 is an equidigital number, since it uses as much as digits as its factorization.

139001389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920690.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 139001389 is about 11789.8850291256. The cubic root of 139001389 is about 518.0118721905.

The spelling of 139001389 in words is "one hundred thirty-nine million, one thousand, three hundred eighty-nine".