71349739 has 4 divisors (see below), whose sum is σ = 71426824. Its totient is φ = 71272656.

The previous prime is 71349721. The next prime is 71349757. The reversal of 71349739 is 93794317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93794317 = 19 ⋅4936543.

It is an interprime number because it is at equal distance from previous prime (71349721) and next prime (71349757).

It is a cyclic number.

It is not a de Polignac number, because 71349739 - 2¹³ = 71341547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71349695 and 71349704.

It is not an unprimeable number, because it can be changed into a prime (71349709) 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 3 ways as a sum of consecutive naturals, for example, 37137 + ... + 39010.

It is an arithmetic number, because the mean of its divisors is an integer number (17856706).

Almost surely, 2^71349739 is an apocalyptic number.

71349739 is a deficient number, since it is larger than the sum of its proper divisors (77085).

71349739 is an equidigital number, since it uses as much as digits as its factorization.

71349739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77084.

The product of its digits is 142884, while the sum is 43.

The square root of 71349739 is about 8446.8774704029. The cubic root of 71349739 is about 414.7605702659.

The spelling of 71349739 in words is "seventy-one million, three hundred forty-nine thousand, seven hundred thirty-nine".