27209061431989 has 2 divisors, whose sum is σ = 27209061431990. Its totient is φ = 27209061431988.

The previous prime is 27209061431971. The next prime is 27209061432001. The reversal of 27209061431989 is 98913416090272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25483364091025 + 1725697340964 = 5048105^2 + 1313658^2 .

It is a cyclic number.

It is not a de Polignac number, because 27209061431989 - 2⁵ = 27209061431957 is a prime.

It is a super-2 number, since 2×27209061431989² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27209061431939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13604530715994 + 13604530715995.

It is an arithmetic number, because the mean of its divisors is an integer number (13604530715995).

Almost surely, 2^{27209061431989} is an apocalyptic number.

It is an amenable number.

27209061431989 is a deficient number, since it is larger than the sum of its proper divisors (1).

27209061431989 is an equidigital number, since it uses as much as digits as its factorization.

27209061431989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 27209061431989 in words is "twenty-seven trillion, two hundred nine billion, sixty-one million, four hundred thirty-one thousand, nine hundred eighty-nine".