91145101 has 2 divisors, whose sum is σ = 91145102. Its totient is φ = 91145100.

The previous prime is 91145069. The next prime is 91145111. The reversal of 91145101 is 10154119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65124900 + 26020201 = 8070^2 + 5101^2 .

It is an emirp because it is prime and its reverse (10154119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91145101 - 2⁵ = 91145069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91145111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45572550 + 45572551.

It is an arithmetic number, because the mean of its divisors is an integer number (45572551).

Almost surely, 2^91145101 is an apocalyptic number.

It is an amenable number.

91145101 is a deficient number, since it is larger than the sum of its proper divisors (1).

91145101 is an equidigital number, since it uses as much as digits as its factorization.

91145101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 91145101 is about 9546.9943437712. The cubic root of 91145101 is about 450.0330856332.

The spelling of 91145101 in words is "ninety-one million, one hundred forty-five thousand, one hundred one".