99261801437 has 2 divisors, whose sum is σ = 99261801438. Its totient is φ = 99261801436.

The previous prime is 99261801433. The next prime is 99261801503. The reversal of 99261801437 is 73410816299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96113020441 + 3148780996 = 310021^2 + 56114^2 .

It is a cyclic number.

It is not a de Polignac number, because 99261801437 - 2² = 99261801433 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99261801433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49630900718 + 49630900719.

It is an arithmetic number, because the mean of its divisors is an integer number (49630900719).

Almost surely, 2^99261801437 is an apocalyptic number.

It is an amenable number.

99261801437 is a deficient number, since it is larger than the sum of its proper divisors (1).

99261801437 is an equidigital number, since it uses as much as digits as its factorization.

99261801437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 99261801437 in words is "ninety-nine billion, two hundred sixty-one million, eight hundred one thousand, four hundred thirty-seven".