70739 has 4 divisors (see below), whose sum is σ = 71424. Its totient is φ = 70056.

The previous prime is 70729. The next prime is 70753. The reversal of 70739 is 93707.

It is a happy number.

70739 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93707 = 83 ⋅1129.

It is a cyclic number.

It is not a de Polignac number, because 70739 - 2¹² = 66643 is a prime.

It is a super-2 number, since 2×70739² = 10008012242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152 + ... + 405.

It is an arithmetic number, because the mean of its divisors is an integer number (17856).

2⁷⁰⁷³⁹ is an apocalyptic number.

70739 is a deficient number, since it is larger than the sum of its proper divisors (685).

70739 is a wasteful number, since it uses less digits than its factorization.

70739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 1323, while the sum is 26.

The square root of 70739 is about 265.9680431932. The cubic root of 70739 is about 41.3573755953.

The spelling of 70739 in words is "seventy thousand, seven hundred thirty-nine".