91010012 has 12 divisors (see below), whose sum is σ = 159844440. Its totient is φ = 45340176.

The previous prime is 91010009. The next prime is 91010021. The reversal of 91010012 is 21001019.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39962 + ... + 42177.

It is an arithmetic number, because the mean of its divisors is an integer number (13320370).

Almost surely, 2^91010012 is an apocalyptic number.

It is an amenable number.

91010012 is a deficient number, since it is larger than the sum of its proper divisors (68834428).

91010012 is a wasteful number, since it uses less digits than its factorization.

91010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82420 (or 82418 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 91010012 is about 9539.9167711254. The cubic root of 91010012 is about 449.8106396698.

The spelling of 91010012 in words is "ninety-one million, ten thousand, twelve".