99669541 has 2 divisors, whose sum is σ = 99669542. Its totient is φ = 99669540.

The previous prime is 99669539. The next prime is 99669551. The reversal of 99669541 is 14596699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73444900 + 26224641 = 8570^2 + 5121^2 .

It is a cyclic number.

It is not a de Polignac number, because 99669541 - 2¹ = 99669539 is a prime.

Together with 99669539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99669551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49834770 + 49834771.

It is an arithmetic number, because the mean of its divisors is an integer number (49834771).

Almost surely, 2^99669541 is an apocalyptic number.

It is an amenable number.

99669541 is a deficient number, since it is larger than the sum of its proper divisors (1).

99669541 is an equidigital number, since it uses as much as digits as its factorization.

99669541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 49.

The square root of 99669541 is about 9983.4633770050. The cubic root of 99669541 is about 463.6470341945.

The spelling of 99669541 in words is "ninety-nine million, six hundred sixty-nine thousand, five hundred forty-one".