99377408609 has 2 divisors, whose sum is σ = 99377408610. Its totient is φ = 99377408608.

The previous prime is 99377408561. The next prime is 99377408621. The reversal of 99377408609 is 90680477399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83736154384 + 15641254225 = 289372^2 + 125065^2 .

It is a cyclic number.

It is not a de Polignac number, because 99377408609 - 2¹² = 99377404513 is a prime.

It is not a weakly prime, because it can be changed into another prime (99377408699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49688704304 + 49688704305.

It is an arithmetic number, because the mean of its divisors is an integer number (49688704305).

Almost surely, 2^99377408609 is an apocalyptic number.

It is an amenable number.

99377408609 is a deficient number, since it is larger than the sum of its proper divisors (1).

99377408609 is an equidigital number, since it uses as much as digits as its factorization.

99377408609 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 62.

The spelling of 99377408609 in words is "ninety-nine billion, three hundred seventy-seven million, four hundred eight thousand, six hundred nine".