91150069 has 2 divisors, whose sum is σ = 91150070. Its totient is φ = 91150068.

The previous prime is 91150001. The next prime is 91150079. The reversal of 91150069 is 96005119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69639025 + 21511044 = 8345^2 + 4638^2 .

It is a cyclic number.

It is not a de Polignac number, because 91150069 - 2⁷ = 91149941 is a prime.

It is a super-2 number, since 2×91150069² = 16616670157409522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91150069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91150079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45575034 + 45575035.

It is an arithmetic number, because the mean of its divisors is an integer number (45575035).

Almost surely, 2^91150069 is an apocalyptic number.

It is an amenable number.

91150069 is a deficient number, since it is larger than the sum of its proper divisors (1).

91150069 is an equidigital number, since it uses as much as digits as its factorization.

91150069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 91150069 is about 9547.2545268260. The cubic root of 91150069 is about 450.0412620600.

The spelling of 91150069 in words is "ninety-one million, one hundred fifty thousand, sixty-nine".