139416481 has 8 divisors (see below), whose sum is σ = 145324160. Its totient is φ = 133621488.

The previous prime is 139416479. The next prime is 139416493. The reversal of 139416481 is 184614931.

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

It is a cyclic number.

It is not a de Polignac number, because 139416481 - 2¹ = 139416479 is a prime.

It is a super-2 number, since 2×139416481² = 38873910348846722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 139416481.

It is not an unprimeable number, because it can be changed into a prime (139416401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25641 + ... + 30598.

It is an arithmetic number, because the mean of its divisors is an integer number (18165520).

Almost surely, 2^139416481 is an apocalyptic number.

It is an amenable number.

139416481 is a deficient number, since it is larger than the sum of its proper divisors (5907679).

139416481 is an equidigital number, since it uses as much as digits as its factorization.

139416481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56343.

The product of its digits is 20736, while the sum is 37.

The square root of 139416481 is about 11807.4756404576. The cubic root of 139416481 is about 518.5269963040.

The spelling of 139416481 in words is "one hundred thirty-nine million, four hundred sixteen thousand, four hundred eighty-one".