27209187949 has 2 divisors, whose sum is σ = 27209187950. Its totient is φ = 27209187948.

The previous prime is 27209187883. The next prime is 27209188037. The reversal of 27209187949 is 94978190272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26177622025 + 1031565924 = 161795^2 + 32118^2 .

It is a cyclic number.

It is not a de Polignac number, because 27209187949 - 2¹⁹ = 27208663661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27209187893 and 27209187902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27209187149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13604593974 + 13604593975.

It is an arithmetic number, because the mean of its divisors is an integer number (13604593975).

Almost surely, 2^27209187949 is an apocalyptic number.

It is an amenable number.

27209187949 is a deficient number, since it is larger than the sum of its proper divisors (1).

27209187949 is an equidigital number, since it uses as much as digits as its factorization.

27209187949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 27209187949 in words is "twenty-seven billion, two hundred nine million, one hundred eighty-seven thousand, nine hundred forty-nine".