70023539 has 4 divisors (see below), whose sum is σ = 70271256. Its totient is φ = 69775824.

The previous prime is 70023533. The next prime is 70023557. The reversal of 70023539 is 93532007.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93532007 = 23 ⋅4066609.

It is a cyclic number.

It is not a de Polignac number, because 70023539 - 2¹⁶ = 69958003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70023533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123434 + ... + 123999.

It is an arithmetic number, because the mean of its divisors is an integer number (17567814).

Almost surely, 2^70023539 is an apocalyptic number.

70023539 is a deficient number, since it is larger than the sum of its proper divisors (247717).

70023539 is a wasteful number, since it uses less digits than its factorization.

70023539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247716.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 70023539 is about 8368.0068714121. The cubic root of 70023539 is about 412.1747204869.

The spelling of 70023539 in words is "seventy million, twenty-three thousand, five hundred thirty-nine".