99786257 has 2 divisors, whose sum is σ = 99786258. Its totient is φ = 99786256.

The previous prime is 99786221. The next prime is 99786263. The reversal of 99786257 is 75268799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98585041 + 1201216 = 9929^2 + 1096^2 .

It is a cyclic number.

It is not a de Polignac number, because 99786257 - 2²² = 95591953 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99786199 and 99786208.

It is not a weakly prime, because it can be changed into another prime (99780257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49893128 + 49893129.

It is an arithmetic number, because the mean of its divisors is an integer number (49893129).

Almost surely, 2^99786257 is an apocalyptic number.

It is an amenable number.

99786257 is a deficient number, since it is larger than the sum of its proper divisors (1).

99786257 is an equidigital number, since it uses as much as digits as its factorization.

99786257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The square root of 99786257 is about 9989.3071331299. The cubic root of 99786257 is about 463.8279450893.

The spelling of 99786257 in words is "ninety-nine million, seven hundred eighty-six thousand, two hundred fifty-seven".