139384471 has 2 divisors, whose sum is σ = 139384472. Its totient is φ = 139384470.

The previous prime is 139384433. The next prime is 139384481. The reversal of 139384471 is 174483931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139384471 - 2¹⁷ = 139253399 is a prime.

It is a super-3 number, since 3×139384471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139384481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69692235 + 69692236.

It is an arithmetic number, because the mean of its divisors is an integer number (69692236).

Almost surely, 2^139384471 is an apocalyptic number.

139384471 is a deficient number, since it is larger than the sum of its proper divisors (1).

139384471 is an equidigital number, since it uses as much as digits as its factorization.

139384471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 139384471 is about 11806.1200654576. The cubic root of 139384471 is about 518.4873086968.

The spelling of 139384471 in words is "one hundred thirty-nine million, three hundred eighty-four thousand, four hundred seventy-one".