90921343 has 2 divisors, whose sum is σ = 90921344. Its totient is φ = 90921342.

The previous prime is 90921331. The next prime is 90921349. The reversal of 90921343 is 34312909.

It is a strong prime.

It is an emirp because it is prime and its reverse (34312909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90921343 - 2⁹ = 90920831 is a prime.

It is a super-2 number, since 2×90921343² = 16533381225847298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90921349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45460671 + 45460672.

It is an arithmetic number, because the mean of its divisors is an integer number (45460672).

Almost surely, 2^90921343 is an apocalyptic number.

90921343 is a deficient number, since it is larger than the sum of its proper divisors (1).

90921343 is an equidigital number, since it uses as much as digits as its factorization.

90921343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 90921343 is about 9535.2683758770. The cubic root of 90921343 is about 449.6645120862.

The spelling of 90921343 in words is "ninety million, nine hundred twenty-one thousand, three hundred forty-three".