70145543 has 4 divisors (see below), whose sum is σ = 75541368. Its totient is φ = 64749720.

The previous prime is 70145521. The next prime is 70145557. The reversal of 70145543 is 34554107.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34554107 = 7 ⋅4936301.

It is a cyclic number.

It is not a de Polignac number, because 70145543 - 2¹⁰ = 70144519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70145563) 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, 2697893 + ... + 2697918.

It is an arithmetic number, because the mean of its divisors is an integer number (18885342).

Almost surely, 2^70145543 is an apocalyptic number.

70145543 is a deficient number, since it is larger than the sum of its proper divisors (5395825).

70145543 is a wasteful number, since it uses less digits than its factorization.

70145543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395824.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 70145543 is about 8375.2936067937. The cubic root of 70145543 is about 412.4139628335.

The spelling of 70145543 in words is "seventy million, one hundred forty-five thousand, five hundred forty-three".