30143693 has 4 divisors (see below), whose sum is σ = 30318108. Its totient is φ = 29969280.

The previous prime is 30143653. The next prime is 30143723. The reversal of 30143693 is 39634103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25421764 + 4721929 = 5042^2 + 2173^2 .

It is a cyclic number.

It is not a de Polignac number, because 30143693 - 2⁸ = 30143437 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 (30143653) 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, 86948 + ... + 87293.

It is an arithmetic number, because the mean of its divisors is an integer number (7579527).

Almost surely, 2^30143693 is an apocalyptic number.

It is an amenable number.

30143693 is a deficient number, since it is larger than the sum of its proper divisors (174415).

30143693 is a wasteful number, since it uses less digits than its factorization.

30143693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174414.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 30143693 is about 5490.3272215780. The cubic root of 30143693 is about 311.2185579223.

Adding to 30143693 its reverse (39634103), we get a palindrome (69777796).

The spelling of 30143693 in words is "thirty million, one hundred forty-three thousand, six hundred ninety-three".