27131895829 has 2 divisors, whose sum is σ = 27131895830. Its totient is φ = 27131895828.

The previous prime is 27131895809. The next prime is 27131895851. The reversal of 27131895829 is 92859813172.

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., 26496351729 + 635544100 = 162777^2 + 25210^2 .

It is a cyclic number.

It is not a de Polignac number, because 27131895829 - 2²¹ = 27129798677 is a prime.

It is a super-2 number, since 2×27131895829² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27131895829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27131895809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13565947914 + 13565947915.

It is an arithmetic number, because the mean of its divisors is an integer number (13565947915).

Almost surely, 2^27131895829 is an apocalyptic number.

It is an amenable number.

27131895829 is a deficient number, since it is larger than the sum of its proper divisors (1).

27131895829 is an equidigital number, since it uses as much as digits as its factorization.

27131895829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 55.

The spelling of 27131895829 in words is "twenty-seven billion, one hundred thirty-one million, eight hundred ninety-five thousand, eight hundred twenty-nine".