27072761 has 2 divisors, whose sum is σ = 27072762. Its totient is φ = 27072760.

The previous prime is 27072743. The next prime is 27072781. The reversal of 27072761 is 16727072.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27040000 + 32761 = 5200^2 + 181^2 .

It is a cyclic number.

It is not a de Polignac number, because 27072761 - 2⁶ = 27072697 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is equal to p_1687307 and since 27072761 and 1687307 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (27072781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13536380 + 13536381.

It is an arithmetic number, because the mean of its divisors is an integer number (13536381).

Almost surely, 2^27072761 is an apocalyptic number.

It is an amenable number.

27072761 is a deficient number, since it is larger than the sum of its proper divisors (1).

27072761 is an equidigital number, since it uses as much as digits as its factorization.

27072761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 27072761 is about 5203.1491425866. The cubic root of 27072761 is about 300.2692434727.

The spelling of 27072761 in words is "twenty-seven million, seventy-two thousand, seven hundred sixty-one".