99940697 has 2 divisors, whose sum is σ = 99940698. Its totient is φ = 99940696.

The previous prime is 99940693. The next prime is 99940721. The reversal of 99940697 is 79604999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84290761 + 15649936 = 9181^2 + 3956^2 .

It is a cyclic number.

It is not a de Polignac number, because 99940697 - 2² = 99940693 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99940693) 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, 49970348 + 49970349.

It is an arithmetic number, because the mean of its divisors is an integer number (49970349).

Almost surely, 2^99940697 is an apocalyptic number.

It is an amenable number.

99940697 is a deficient number, since it is larger than the sum of its proper divisors (1).

99940697 is an equidigital number, since it uses as much as digits as its factorization.

99940697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The square root of 99940697 is about 9997.0344102639. The cubic root of 99940697 is about 464.0671118369.

The spelling of 99940697 in words is "ninety-nine million, nine hundred forty thousand, six hundred ninety-seven".