139904471 has 16 divisors (see below), whose sum is σ = 163468800. Its totient is φ = 117250848.

The previous prime is 139904461. The next prime is 139904483. The reversal of 139904471 is 174409931.

It is a cyclic number.

It is not a de Polignac number, because 139904471 - 2¹⁰ = 139903447 is a prime.

It is a super-3 number, since 3×139904471³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139904411) 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, 162440 + ... + 163298.

It is an arithmetic number, because the mean of its divisors is an integer number (10216800).

Almost surely, 2^139904471 is an apocalyptic number.

139904471 is a deficient number, since it is larger than the sum of its proper divisors (23564329).

139904471 is an equidigital number, since it uses as much as digits as its factorization.

139904471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 139904471 is about 11828.1220402903. The cubic root of 139904471 is about 519.1312800340.

The spelling of 139904471 in words is "one hundred thirty-nine million, nine hundred four thousand, four hundred seventy-one".