139680449 has 8 divisors (see below), whose sum is σ = 154327680. Its totient is φ = 125747776.

The previous prime is 139680433. The next prime is 139680479. The reversal of 139680449 is 944086931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139680449 - 2⁴ = 139680433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139680479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178229 + ... + 179010.

It is an arithmetic number, because the mean of its divisors is an integer number (19290960).

Almost surely, 2^139680449 is an apocalyptic number.

It is an amenable number.

139680449 is a deficient number, since it is larger than the sum of its proper divisors (14647231).

139680449 is a wasteful number, since it uses less digits than its factorization.

139680449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357279.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 139680449 is about 11818.6483575746. The cubic root of 139680449 is about 518.8540457291.

The spelling of 139680449 in words is "one hundred thirty-nine million, six hundred eighty thousand, four hundred forty-nine".