27929995949 has 2 divisors, whose sum is σ = 27929995950. Its totient is φ = 27929995948.

The previous prime is 27929995883. The next prime is 27929995967. The reversal of 27929995949 is 94959992972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17551480324 + 10378515625 = 132482^2 + 101875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27929995949 is a prime.

It is a super-2 number, since 2×27929995949² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27929998949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13964997974 + 13964997975.

It is an arithmetic number, because the mean of its divisors is an integer number (13964997975).

Almost surely, 2^27929995949 is an apocalyptic number.

It is an amenable number.

27929995949 is a deficient number, since it is larger than the sum of its proper divisors (1).

27929995949 is an equidigital number, since it uses as much as digits as its factorization.

27929995949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 297606960, while the sum is 74.

The spelling of 27929995949 in words is "twenty-seven billion, nine hundred twenty-nine million, nine hundred ninety-five thousand, nine hundred forty-nine".