91148737 has 2 divisors, whose sum is σ = 91148738. Its totient is φ = 91148736.

The previous prime is 91148693. The next prime is 91148753. The reversal of 91148737 is 73784119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60777616 + 30371121 = 7796^2 + 5511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91148737 is a prime.

It is a super-3 number, since 3×91148737³ (a number of 25 digits) contains 333 as substring.

It is equal to p_5279764 and since 91148737 and 5279764 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91148737.

It is not a weakly prime, because it can be changed into another prime (91148137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45574368 + 45574369.

It is an arithmetic number, because the mean of its divisors is an integer number (45574369).

Almost surely, 2^91148737 is an apocalyptic number.

It is an amenable number.

91148737 is a deficient number, since it is larger than the sum of its proper divisors (1).

91148737 is an equidigital number, since it uses as much as digits as its factorization.

91148737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 40.

The square root of 91148737 is about 9547.1847682969. The cubic root of 91148737 is about 450.0390698588.

The spelling of 91148737 in words is "ninety-one million, one hundred forty-eight thousand, seven hundred thirty-seven".