91196137 has 2 divisors, whose sum is σ = 91196138. Its totient is φ = 91196136.

The previous prime is 91196101. The next prime is 91196153. The reversal of 91196137 is 73169119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90174016 + 1022121 = 9496^2 + 1011^2 .

It is an emirp because it is prime and its reverse (73169119) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91196137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91196096 and 91196105.

It is not a weakly prime, because it can be changed into another prime (91196437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45598068 + 45598069.

It is an arithmetic number, because the mean of its divisors is an integer number (45598069).

Almost surely, 2^91196137 is an apocalyptic number.

It is an amenable number.

91196137 is a deficient number, since it is larger than the sum of its proper divisors (1).

91196137 is an equidigital number, since it uses as much as digits as its factorization.

91196137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 37.

The square root of 91196137 is about 9549.6668528279. Note that the first 3 decimals coincide. The cubic root of 91196137 is about 450.1170674846.

The spelling of 91196137 in words is "ninety-one million, one hundred ninety-six thousand, one hundred thirty-seven".