99440437 has 2 divisors, whose sum is σ = 99440438. Its totient is φ = 99440436.

The previous prime is 99440401. The next prime is 99440441. The reversal of 99440437 is 73404499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92332881 + 7107556 = 9609^2 + 2666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99440437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99440437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99440447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49720218 + 49720219.

It is an arithmetic number, because the mean of its divisors is an integer number (49720219).

Almost surely, 2^99440437 is an apocalyptic number.

It is an amenable number.

99440437 is a deficient number, since it is larger than the sum of its proper divisors (1).

99440437 is an equidigital number, since it uses as much as digits as its factorization.

99440437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 99440437 is about 9971.9826012684. The cubic root of 99440437 is about 463.2915097191.

The spelling of 99440437 in words is "ninety-nine million, four hundred forty thousand, four hundred thirty-seven".