99212507 has 2 divisors, whose sum is σ = 99212508. Its totient is φ = 99212506.

The previous prime is 99212417. The next prime is 99212513. The reversal of 99212507 is 70521299.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99212507 - 2¹² = 99208411 is a prime.

It is not a weakly prime, because it can be changed into another prime (99212557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49606253 + 49606254.

It is an arithmetic number, because the mean of its divisors is an integer number (49606254).

Almost surely, 2^99212507 is an apocalyptic number.

99212507 is a deficient number, since it is larger than the sum of its proper divisors (1).

99212507 is an equidigital number, since it uses as much as digits as its factorization.

99212507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 99212507 is about 9960.5475251113. The cubic root of 99212507 is about 462.9372647686.

The spelling of 99212507 in words is "ninety-nine million, two hundred twelve thousand, five hundred seven".