91125077 has 2 divisors, whose sum is σ = 91125078. Its totient is φ = 91125076.

The previous prime is 91125071. The next prime is 91125079. The reversal of 91125077 is 77052119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72063121 + 19061956 = 8489^2 + 4366^2 .

It is an emirp because it is prime and its reverse (77052119) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91125077 is a prime.

Together with 91125079, 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 (91125071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45562538 + 45562539.

It is an arithmetic number, because the mean of its divisors is an integer number (45562539).

Almost surely, 2^91125077 is an apocalyptic number.

It is an amenable number.

91125077 is a deficient number, since it is larger than the sum of its proper divisors (1).

91125077 is an equidigital number, since it uses as much as digits as its factorization.

91125077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 91125077 is about 9545.9455791451. The cubic root of 91125077 is about 450.0001267489. Note that the first 3 decimals are identical.

The spelling of 91125077 in words is "ninety-one million, one hundred twenty-five thousand, seventy-seven".