99780743 has 2 divisors, whose sum is σ = 99780744. Its totient is φ = 99780742.

The previous prime is 99780731. The next prime is 99780763. The reversal of 99780743 is 34708799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99780743 - 2⁴ = 99780727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99780763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49890371 + 49890372.

It is an arithmetic number, because the mean of its divisors is an integer number (49890372).

Almost surely, 2^99780743 is an apocalyptic number.

99780743 is a deficient number, since it is larger than the sum of its proper divisors (1).

99780743 is an equidigital number, since it uses as much as digits as its factorization.

99780743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 99780743 is about 9989.0311341992. The cubic root of 99780743 is about 463.8194015134.

The spelling of 99780743 in words is "ninety-nine million, seven hundred eighty thousand, seven hundred forty-three".