99437791 has 2 divisors, whose sum is σ = 99437792. Its totient is φ = 99437790.

The previous prime is 99437783. The next prime is 99437803. The reversal of 99437791 is 19773499.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99437791 - 2³ = 99437783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99437711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49718895 + 49718896.

It is an arithmetic number, because the mean of its divisors is an integer number (49718896).

Almost surely, 2^99437791 is an apocalyptic number.

99437791 is a deficient number, since it is larger than the sum of its proper divisors (1).

99437791 is an equidigital number, since it uses as much as digits as its factorization.

99437791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 49.

The square root of 99437791 is about 9971.8499286742. The cubic root of 99437791 is about 463.2874004578.

The spelling of 99437791 in words is "ninety-nine million, four hundred thirty-seven thousand, seven hundred ninety-one".