91622429 has 2 divisors, whose sum is σ = 91622430. Its totient is φ = 91622428.

The previous prime is 91622423. The next prime is 91622431. The reversal of 91622429 is 92422619.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84456100 + 7166329 = 9190^2 + 2677^2 .

It is a cyclic number.

It is not a de Polignac number, because 91622429 - 2¹² = 91618333 is a prime.

Together with 91622431, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91622423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45811214 + 45811215.

It is an arithmetic number, because the mean of its divisors is an integer number (45811215).

Almost surely, 2^91622429 is an apocalyptic number.

It is an amenable number.

91622429 is a deficient number, since it is larger than the sum of its proper divisors (1).

91622429 is an equidigital number, since it uses as much as digits as its factorization.

91622429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 91622429 is about 9571.9605619748. The cubic root of 91622429 is about 450.8173277707.

The spelling of 91622429 in words is "ninety-one million, six hundred twenty-two thousand, four hundred twenty-nine".