90945319 has 2 divisors, whose sum is σ = 90945320. Its totient is φ = 90945318.

The previous prime is 90945317. The next prime is 90945389. The reversal of 90945319 is 91354909.

It is a weak prime.

It is an emirp because it is prime and its reverse (91354909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90945319 - 2¹ = 90945317 is a prime.

It is a super-2 number, since 2×90945319² = 16542102096023522, which contains 22 as substring.

Together with 90945317, 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 (90945311) 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, 45472659 + 45472660.

It is an arithmetic number, because the mean of its divisors is an integer number (45472660).

Almost surely, 2^90945319 is an apocalyptic number.

90945319 is a deficient number, since it is larger than the sum of its proper divisors (1).

90945319 is an equidigital number, since it uses as much as digits as its factorization.

90945319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 90945319 is about 9536.5255203350. The cubic root of 90945319 is about 449.7040341920.

The spelling of 90945319 in words is "ninety million, nine hundred forty-five thousand, three hundred nineteen".