27555401 has 2 divisors, whose sum is σ = 27555402. Its totient is φ = 27555400.

The previous prime is 27555397. The next prime is 27555421. The reversal of 27555401 is 10455572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27290176 + 265225 = 5224^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 27555401 - 2² = 27555397 is a prime.

It is not a weakly prime, because it can be changed into another prime (27555421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13777700 + 13777701.

It is an arithmetic number, because the mean of its divisors is an integer number (13777701).

Almost surely, 2^27555401 is an apocalyptic number.

It is an amenable number.

27555401 is a deficient number, since it is larger than the sum of its proper divisors (1).

27555401 is an equidigital number, since it uses as much as digits as its factorization.

27555401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 27555401 is about 5249.3238612225. The cubic root of 27555401 is about 302.0430950299.

The spelling of 27555401 in words is "twenty-seven million, five hundred fifty-five thousand, four hundred one".