99912151 has 2 divisors, whose sum is σ = 99912152. Its totient is φ = 99912150.

The previous prime is 99912149. The next prime is 99912157. The reversal of 99912151 is 15121999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99912151 - 2¹ = 99912149 is a prime.

Together with 99912149, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 99912151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99912157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49956075 + 49956076.

It is an arithmetic number, because the mean of its divisors is an integer number (49956076).

Almost surely, 2^99912151 is an apocalyptic number.

99912151 is a deficient number, since it is larger than the sum of its proper divisors (1).

99912151 is an equidigital number, since it uses as much as digits as its factorization.

99912151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290, while the sum is 37.

The square root of 99912151 is about 9995.6065848952. The cubic root of 99912151 is about 464.0229238947.

The spelling of 99912151 in words is "ninety-nine million, nine hundred twelve thousand, one hundred fifty-one".