91425329 has 2 divisors, whose sum is σ = 91425330. Its totient is φ = 91425328.

The previous prime is 91425311. The next prime is 91425331. The reversal of 91425329 is 92352419.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61701025 + 29724304 = 7855^2 + 5452^2 .

It is an emirp because it is prime and its reverse (92352419) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91425329 is a prime.

It is a super-4 number, since 4×91425329⁴ (a number of 33 digits) contains 4444 as substring.

It is a Sophie Germain prime.

Together with 91425331, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (91425349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45712664 + 45712665.

It is an arithmetic number, because the mean of its divisors is an integer number (45712665).

Almost surely, 2^91425329 is an apocalyptic number.

It is an amenable number.

91425329 is a deficient number, since it is larger than the sum of its proper divisors (1).

91425329 is an equidigital number, since it uses as much as digits as its factorization.

91425329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 91425329 is about 9561.6593225235. The cubic root of 91425329 is about 450.4938266045.

The spelling of 91425329 in words is "ninety-one million, four hundred twenty-five thousand, three hundred twenty-nine".