27084721 has 2 divisors, whose sum is σ = 27084722. Its totient is φ = 27084720.

The previous prime is 27084713. The next prime is 27084727. The reversal of 27084721 is 12748072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22695696 + 4389025 = 4764^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 27084721 - 2³ = 27084713 is a prime.

It is a super-2 number, since 2×27084721² = 1467164223295682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27084727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13542360 + 13542361.

It is an arithmetic number, because the mean of its divisors is an integer number (13542361).

Almost surely, 2^27084721 is an apocalyptic number.

It is an amenable number.

27084721 is a deficient number, since it is larger than the sum of its proper divisors (1).

27084721 is an equidigital number, since it uses as much as digits as its factorization.

27084721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 27084721 is about 5204.2983196585. The cubic root of 27084721 is about 300.3134538563.

The spelling of 27084721 in words is "twenty-seven million, eighty-four thousand, seven hundred twenty-one".