91101641 has 2 divisors, whose sum is σ = 91101642. Its totient is φ = 91101640.

The previous prime is 91101607. The next prime is 91101667. The reversal of 91101641 is 14610119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50410000 + 40691641 = 7100^2 + 6379^2 .

It is a cyclic number.

It is not a de Polignac number, because 91101641 - 2¹⁴ = 91085257 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (91101041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45550820 + 45550821.

It is an arithmetic number, because the mean of its divisors is an integer number (45550821).

Almost surely, 2^91101641 is an apocalyptic number.

It is an amenable number.

91101641 is a deficient number, since it is larger than the sum of its proper divisors (1).

91101641 is an equidigital number, since it uses as much as digits as its factorization.

91101641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 91101641 is about 9544.7179633554. The cubic root of 91101641 is about 449.9615456852.

The spelling of 91101641 in words is "ninety-one million, one hundred one thousand, six hundred forty-one".