91550351 has 2 divisors, whose sum is σ = 91550352. Its totient is φ = 91550350.

The previous prime is 91550317. The next prime is 91550369. The reversal of 91550351 is 15305519.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (15305519) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91550351 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91550951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45775175 + 45775176.

It is an arithmetic number, because the mean of its divisors is an integer number (45775176).

Almost surely, 2^91550351 is an apocalyptic number.

91550351 is a deficient number, since it is larger than the sum of its proper divisors (1).

91550351 is an equidigital number, since it uses as much as digits as its factorization.

91550351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 91550351 is about 9568.1947618137. The cubic root of 91550351 is about 450.6990796653.

The spelling of 91550351 in words is "ninety-one million, five hundred fifty thousand, three hundred fifty-one".