99551237 has 2 divisors, whose sum is σ = 99551238. Its totient is φ = 99551236.

The previous prime is 99551183. The next prime is 99551273. The reversal of 99551237 is 73215599.

Together with next prime (99551273) 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., 94750756 + 4800481 = 9734^2 + 2191^2 .

It is a cyclic number.

It is not a de Polignac number, because 99551237 - 2²⁰ = 98502661 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99551194 and 99551203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99551537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49775618 + 49775619.

It is an arithmetic number, because the mean of its divisors is an integer number (49775619).

Almost surely, 2^99551237 is an apocalyptic number.

It is an amenable number.

99551237 is a deficient number, since it is larger than the sum of its proper divisors (1).

99551237 is an equidigital number, since it uses as much as digits as its factorization.

99551237 is an evil number, because the sum of its binary digits is even.

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

The square root of 99551237 is about 9977.5366198276. The cubic root of 99551237 is about 463.4635176971.

The spelling of 99551237 in words is "ninety-nine million, five hundred fifty-one thousand, two hundred thirty-seven".