99840151 has 2 divisors, whose sum is σ = 99840152. Its totient is φ = 99840150.

The previous prime is 99840113. The next prime is 99840179. The reversal of 99840151 is 15104899.

It is a strong prime.

It is an emirp because it is prime and its reverse (15104899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99840151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99840151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99840751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49920075 + 49920076.

It is an arithmetic number, because the mean of its divisors is an integer number (49920076).

Almost surely, 2^99840151 is an apocalyptic number.

99840151 is a deficient number, since it is larger than the sum of its proper divisors (1).

99840151 is an equidigital number, since it uses as much as digits as its factorization.

99840151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 99840151 is about 9992.0043534818. The cubic root of 99840151 is about 463.9114336880.

The spelling of 99840151 in words is "ninety-nine million, eight hundred forty thousand, one hundred fifty-one".