139496471 has 2 divisors, whose sum is σ = 139496472. Its totient is φ = 139496470.

The previous prime is 139496443. The next prime is 139496521. The reversal of 139496471 is 174694931.

It is a weak prime.

It is an emirp because it is prime and its reverse (174694931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139496471 - 2²⁶ = 72387607 is a prime.

It is a super-3 number, since 3×139496471³ (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 (139496411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69748235 + 69748236.

It is an arithmetic number, because the mean of its divisors is an integer number (69748236).

Almost surely, 2^139496471 is an apocalyptic number.

139496471 is a deficient number, since it is larger than the sum of its proper divisors (1).

139496471 is an equidigital number, since it uses as much as digits as its factorization.

139496471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 139496471 is about 11810.8624155902. The cubic root of 139496471 is about 518.6261453769.

The spelling of 139496471 in words is "one hundred thirty-nine million, four hundred ninety-six thousand, four hundred seventy-one".