91518029 has 2 divisors, whose sum is σ = 91518030. Its totient is φ = 91518028.

The previous prime is 91517971. The next prime is 91518059. The reversal of 91518029 is 92081519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67732900 + 23785129 = 8230^2 + 4877^2 .

It is an emirp because it is prime and its reverse (92081519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91518029 - 2⁸ = 91517773 is a prime.

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 91518029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91518059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45759014 + 45759015.

It is an arithmetic number, because the mean of its divisors is an integer number (45759015).

Almost surely, 2^91518029 is an apocalyptic number.

It is an amenable number.

91518029 is a deficient number, since it is larger than the sum of its proper divisors (1).

91518029 is an equidigital number, since it uses as much as digits as its factorization.

91518029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 91518029 is about 9566.5055793639. The cubic root of 91518029 is about 450.6460334082.

The spelling of 91518029 in words is "ninety-one million, five hundred eighteen thousand, twenty-nine".