27073721 has 2 divisors, whose sum is σ = 27073722. Its totient is φ = 27073720.

The previous prime is 27073693. The next prime is 27073759. The reversal of 27073721 is 12737072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22429696 + 4644025 = 4736^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 27073721 - 2¹⁰ = 27072697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27073771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13536860 + 13536861.

It is an arithmetic number, because the mean of its divisors is an integer number (13536861).

Almost surely, 2^27073721 is an apocalyptic number.

It is an amenable number.

27073721 is a deficient number, since it is larger than the sum of its proper divisors (1).

27073721 is an equidigital number, since it uses as much as digits as its factorization.

27073721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 27073721 is about 5203.2413935930. The cubic root of 27073721 is about 300.2727926129.

The spelling of 27073721 in words is "twenty-seven million, seventy-three thousand, seven hundred twenty-one".