139444653 has 16 divisors (see below), whose sum is σ = 195503616. Its totient is φ = 88236720.

The previous prime is 139444651. The next prime is 139444703. The reversal of 139444653 is 356444931.

139444653 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 139444653 - 2¹ = 139444651 is a prime.

It is a super-2 number, since 2×139444653² = 38889622500580818, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139444651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1326 + ... + 16752.

It is an arithmetic number, because the mean of its divisors is an integer number (12218976).

Almost surely, 2^139444653 is an apocalyptic number.

It is an amenable number.

139444653 is a deficient number, since it is larger than the sum of its proper divisors (56058963).

139444653 is a wasteful number, since it uses less digits than its factorization.

139444653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15584.

The product of its digits is 155520, while the sum is 39.

The square root of 139444653 is about 11808.6685532282. The cubic root of 139444653 is about 518.5619203402.

The spelling of 139444653 in words is "one hundred thirty-nine million, four hundred forty-four thousand, six hundred fifty-three".