91512011 has 2 divisors, whose sum is σ = 91512012. Its totient is φ = 91512010.

The previous prime is 91512007. The next prime is 91512049. The reversal of 91512011 is 11021519.

It is a weak prime.

It is an emirp because it is prime and its reverse (11021519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91512011 - 2² = 91512007 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91514011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45756005 + 45756006.

It is an arithmetic number, because the mean of its divisors is an integer number (45756006).

Almost surely, 2^91512011 is an apocalyptic number.

91512011 is a deficient number, since it is larger than the sum of its proper divisors (1).

91512011 is an equidigital number, since it uses as much as digits as its factorization.

91512011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 91512011 is about 9566.1910392799. The cubic root of 91512011 is about 450.6361554009.

The spelling of 91512011 in words is "ninety-one million, five hundred twelve thousand, eleven".