91530377 has 2 divisors, whose sum is σ = 91530378. Its totient is φ = 91530376.

The previous prime is 91530371. The next prime is 91530379. The reversal of 91530377 is 77303519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48706441 + 42823936 = 6979^2 + 6544^2 .

It is an emirp because it is prime and its reverse (77303519) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91530377 is a prime.

Together with 91530379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91530371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45765188 + 45765189.

It is an arithmetic number, because the mean of its divisors is an integer number (45765189).

Almost surely, 2^91530377 is an apocalyptic number.

It is an amenable number.

91530377 is a deficient number, since it is larger than the sum of its proper divisors (1).

91530377 is an equidigital number, since it uses as much as digits as its factorization.

91530377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19845, while the sum is 35.

The square root of 91530377 is about 9567.1509343169. The cubic root of 91530377 is about 450.6663001871. Note that the first 3 decimals are identical.

The spelling of 91530377 in words is "ninety-one million, five hundred thirty thousand, three hundred seventy-seven".