27969401 has 4 divisors (see below), whose sum is σ = 27980532. Its totient is φ = 27958272.

The previous prime is 27969391. The next prime is 27969419. The reversal of 27969401 is 10496972.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 7728400 + 20241001 = 2780^2 + 4499^2 .

It is a cyclic number.

It is not a de Polignac number, because 27969401 - 2¹⁰ = 27968377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27969451) 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, 185 + ... + 7481.

It is an arithmetic number, because the mean of its divisors is an integer number (6995133).

Almost surely, 2^27969401 is an apocalyptic number.

It is an amenable number.

27969401 is a deficient number, since it is larger than the sum of its proper divisors (11131).

27969401 is an equidigital number, since it uses as much as digits as its factorization.

27969401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11130.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 27969401 is about 5288.6104980420. The cubic root of 27969401 is about 303.5482418857.

The spelling of 27969401 in words is "twenty-seven million, nine hundred sixty-nine thousand, four hundred one".