139280739 has 32 divisors (see below), whose sum is σ = 204900864. Its totient is φ = 83635200.

The previous prime is 139280699. The next prime is 139280747. The reversal of 139280739 is 937082931.

It is not a de Polignac number, because 139280739 - 2⁷ = 139280611 is a prime.

It is a super-2 number, since 2×139280739² = 38798248512772242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139280739.

It is not an unprimeable number, because it can be changed into a prime (139280759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394387 + ... + 394739.

It is an arithmetic number, because the mean of its divisors is an integer number (6403152).

Almost surely, 2^139280739 is an apocalyptic number.

139280739 is a deficient number, since it is larger than the sum of its proper divisors (65620125).

139280739 is a wasteful number, since it uses less digits than its factorization.

139280739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 139280739 is about 11801.7261025665. The cubic root of 139280739 is about 518.3586547828.

The spelling of 139280739 in words is "one hundred thirty-nine million, two hundred eighty thousand, seven hundred thirty-nine".