27606421 has 2 divisors, whose sum is σ = 27606422. Its totient is φ = 27606420.

The previous prime is 27606413. The next prime is 27606427. The reversal of 27606421 is 12460672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14364100 + 13242321 = 3790^2 + 3639^2 .

It is a cyclic number.

It is not a de Polignac number, because 27606421 - 2³ = 27606413 is a prime.

It is a super-2 number, since 2×27606421² = 1524228960858482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27606421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27606427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13803210 + 13803211.

It is an arithmetic number, because the mean of its divisors is an integer number (13803211).

Almost surely, 2^27606421 is an apocalyptic number.

It is an amenable number.

27606421 is a deficient number, since it is larger than the sum of its proper divisors (1).

27606421 is an equidigital number, since it uses as much as digits as its factorization.

27606421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 27606421 is about 5254.1812873177. The cubic root of 27606421 is about 302.2293953197.

The spelling of 27606421 in words is "twenty-seven million, six hundred six thousand, four hundred twenty-one".