27970693 has 4 divisors (see below), whose sum is σ = 28003968. Its totient is φ = 27937420.

The previous prime is 27970681. The next prime is 27970699. The reversal of 27970693 is 39607972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27970693 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 (27970699) 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, 15343 + ... + 17068.

It is an arithmetic number, because the mean of its divisors is an integer number (7000992).

Almost surely, 2^27970693 is an apocalyptic number.

It is an amenable number.

27970693 is a deficient number, since it is larger than the sum of its proper divisors (33275).

27970693 is an equidigital number, since it uses as much as digits as its factorization.

27970693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33274.

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

The square root of 27970693 is about 5288.7326459181. The cubic root of 27970693 is about 303.5529157826.

The spelling of 27970693 in words is "twenty-seven million, nine hundred seventy thousand, six hundred ninety-three".