139419621 has 12 divisors (see below), whose sum is σ = 219691680. Its totient is φ = 84496680.

The previous prime is 139419569. The next prime is 139419653. The reversal of 139419621 is 126914931.

It is a happy number.

139419621 is a `hidden beast` number, since 13 + 9 + 4 + 19 + 621 = 666.

It is not a de Polignac number, because 139419621 - 2⁹ = 139419109 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139419671) 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 11 ways as a sum of consecutive naturals, for example, 704041 + ... + 704238.

It is an arithmetic number, because the mean of its divisors is an integer number (18307640).

Almost surely, 2^139419621 is an apocalyptic number.

139419621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

139419621 is a deficient number, since it is larger than the sum of its proper divisors (80272059).

139419621 is a wasteful number, since it uses less digits than its factorization.

139419621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408296 (or 1408293 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 139419621 is about 11807.6086063182. The cubic root of 139419621 is about 518.5308891067.

The spelling of 139419621 in words is "one hundred thirty-nine million, four hundred nineteen thousand, six hundred twenty-one".