91870151 has 2 divisors, whose sum is σ = 91870152. Its totient is φ = 91870150.

The previous prime is 91870099. The next prime is 91870157. The reversal of 91870151 is 15107819.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91870151 - 2¹⁴ = 91853767 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91870157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45935075 + 45935076.

It is an arithmetic number, because the mean of its divisors is an integer number (45935076).

Almost surely, 2^91870151 is an apocalyptic number.

91870151 is a deficient number, since it is larger than the sum of its proper divisors (1).

91870151 is an equidigital number, since it uses as much as digits as its factorization.

91870151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 91870151 is about 9584.8918095094. The cubic root of 91870151 is about 451.2232577518.

The spelling of 91870151 in words is "ninety-one million, eight hundred seventy thousand, one hundred fifty-one".