27948939497 has 2 divisors, whose sum is σ = 27948939498. Its totient is φ = 27948939496.

The previous prime is 27948939467. The next prime is 27948939527. The reversal of 27948939497 is 79493984972.

It is a balanced prime because it is at equal distance from previous prime (27948939467) and next prime (27948939527).

It can be written as a sum of positive squares in only one way, i.e., 26122317376 + 1826622121 = 161624^2 + 42739^2 .

It is a cyclic number.

It is not a de Polignac number, because 27948939497 - 2²⁴ = 27932162281 is a prime.

It is a super-2 number, since 2×27948939497² (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 27948939497.

It is not a weakly prime, because it can be changed into another prime (27948939427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13974469748 + 13974469749.

It is an arithmetic number, because the mean of its divisors is an integer number (13974469749).

Almost surely, 2^27948939497 is an apocalyptic number.

It is an amenable number.

27948939497 is a deficient number, since it is larger than the sum of its proper divisors (1).

27948939497 is an equidigital number, since it uses as much as digits as its factorization.

27948939497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246903552, while the sum is 71.

The spelling of 27948939497 in words is "twenty-seven billion, nine hundred forty-eight million, nine hundred thirty-nine thousand, four hundred ninety-seven".