139489279 has 16 divisors (see below), whose sum is σ = 150958080. Its totient is φ = 128472480.

The previous prime is 139489277. The next prime is 139489283. The reversal of 139489279 is 972984931.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 139489279 - 2¹ = 139489277 is a prime.

It is a super-4 number, since 4×139489279⁴ (a number of 34 digits) contains 4444 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 (139489277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161202 + ... + 162064.

It is an arithmetic number, because the mean of its divisors is an integer number (9434880).

Almost surely, 2^139489279 is an apocalyptic number.

139489279 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

139489279 is a deficient number, since it is larger than the sum of its proper divisors (11468801).

139489279 is a wasteful number, since it uses less digits than its factorization.

139489279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110.

The product of its digits is 979776, while the sum is 52.

The square root of 139489279 is about 11810.5579461768. The cubic root of 139489279 is about 518.6172323119.

The spelling of 139489279 in words is "one hundred thirty-nine million, four hundred eighty-nine thousand, two hundred seventy-nine".