87127099949 has 2 divisors, whose sum is σ = 87127099950. Its totient is φ = 87127099948.

The previous prime is 87127099907. The next prime is 87127099951. The reversal of 87127099949 is 94999072178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82724113924 + 4402986025 = 287618^2 + 66355^2 .

It is a cyclic number.

It is not a de Polignac number, because 87127099949 - 2³² = 82832132653 is a prime.

It is a super-2 number, since 2×87127099949² (a number of 23 digits) contains 22 as substring.

Together with 87127099951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87127099049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43563549974 + 43563549975.

It is an arithmetic number, because the mean of its divisors is an integer number (43563549975).

Almost surely, 2^87127099949 is an apocalyptic number.

It is an amenable number.

87127099949 is a deficient number, since it is larger than the sum of its proper divisors (1).

87127099949 is an equidigital number, since it uses as much as digits as its factorization.

87127099949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20575296, while the sum is 65.

The spelling of 87127099949 in words is "eighty-seven billion, one hundred twenty-seven million, ninety-nine thousand, nine hundred forty-nine".