91065070 has 16 divisors (see below), whose sum is σ = 166605408. Its totient is φ = 35828640.

The previous prime is 91065061. The next prime is 91065071. The reversal of 91065070 is 7056019.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91065071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74034 + ... + 75253.

It is an arithmetic number, because the mean of its divisors is an integer number (10412838).

Almost surely, 2^91065070 is an apocalyptic number.

91065070 is a deficient number, since it is larger than the sum of its proper divisors (75540338).

91065070 is a wasteful number, since it uses less digits than its factorization.

91065070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149355.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 91065070 is about 9542.8019994130. The cubic root of 91065070 is about 449.9013281600.

The spelling of 91065070 in words is "ninety-one million, sixty-five thousand, seventy".