99540523 has 2 divisors, whose sum is σ = 99540524. Its totient is φ = 99540522.

The previous prime is 99540461. The next prime is 99540533. The reversal of 99540523 is 32504599.

It is a strong prime.

It is an emirp because it is prime and its reverse (32504599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99540523 - 2¹⁷ = 99409451 is a prime.

It is a super-2 number, since 2×99540523² = 19816631438227058, which contains 22 as substring.

It is equal to p_5736439 and since 99540523 and 5736439 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (99540533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49770261 + 49770262.

It is an arithmetic number, because the mean of its divisors is an integer number (49770262).

Almost surely, 2^99540523 is an apocalyptic number.

99540523 is a deficient number, since it is larger than the sum of its proper divisors (1).

99540523 is an equidigital number, since it uses as much as digits as its factorization.

99540523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 99540523 is about 9976.9996993084. Note that the first 3 decimals coincide. The cubic root of 99540523 is about 463.4468906602.

The spelling of 99540523 in words is "ninety-nine million, five hundred forty thousand, five hundred twenty-three".