87953399489 has 2 divisors, whose sum is σ = 87953399490. Its totient is φ = 87953399488.

The previous prime is 87953399461. The next prime is 87953399593. The reversal of 87953399489 is 98499335978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76253299600 + 11700099889 = 276140^2 + 108167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87953399489 is a prime.

It is a super-2 number, since 2×87953399489² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87953399419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43976699744 + 43976699745.

It is an arithmetic number, because the mean of its divisors is an integer number (43976699745).

Almost surely, 2^87953399489 is an apocalyptic number.

It is an amenable number.

87953399489 is a deficient number, since it is larger than the sum of its proper divisors (1).

87953399489 is an equidigital number, since it uses as much as digits as its factorization.

87953399489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529079040, while the sum is 74.

The spelling of 87953399489 in words is "eighty-seven billion, nine hundred fifty-three million, three hundred ninety-nine thousand, four hundred eighty-nine".