99986507 has 2 divisors, whose sum is σ = 99986508. Its totient is φ = 99986506.

The previous prime is 99986489. The next prime is 99986521. The reversal of 99986507 is 70568999.

It is a strong prime.

It is an emirp because it is prime and its reverse (70568999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99986507 - 2⁸ = 99986251 is a prime.

It is a super-2 number, since 2×99986507² = 19994603164122098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99986527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49993253 + 49993254.

It is an arithmetic number, because the mean of its divisors is an integer number (49993254).

Almost surely, 2^99986507 is an apocalyptic number.

99986507 is a deficient number, since it is larger than the sum of its proper divisors (1).

99986507 is an equidigital number, since it uses as much as digits as its factorization.

99986507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 99986507 is about 9999.3253272408. The cubic root of 99986507 is about 464.1380061029.

The spelling of 99986507 in words is "ninety-nine million, nine hundred eighty-six thousand, five hundred seven".