99551273 has 2 divisors, whose sum is σ = 99551274. Its totient is φ = 99551272.

The previous prime is 99551237. The next prime is 99551281. The reversal of 99551273 is 37215599.

Together with previous prime (99551237) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86359849 + 13191424 = 9293^2 + 3632^2 .

It is a cyclic number.

It is not a de Polignac number, because 99551273 - 2¹² = 99547177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99551273.

It is not a weakly prime, because it can be changed into another prime (99550273) 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, 49775636 + 49775637.

It is an arithmetic number, because the mean of its divisors is an integer number (49775637).

Almost surely, 2^99551273 is an apocalyptic number.

It is an amenable number.

99551273 is a deficient number, since it is larger than the sum of its proper divisors (1).

99551273 is an equidigital number, since it uses as much as digits as its factorization.

99551273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 41.

The square root of 99551273 is about 9977.5384238799. The cubic root of 99551273 is about 463.4635735634.

The spelling of 99551273 in words is "ninety-nine million, five hundred fifty-one thousand, two hundred seventy-three".