91351907 has 2 divisors, whose sum is σ = 91351908. Its totient is φ = 91351906.

The previous prime is 91351903. The next prime is 91351957. The reversal of 91351907 is 70915319.

It is a weak prime.

It is an emirp because it is prime and its reverse (70915319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91351907 - 2² = 91351903 is a prime.

It is not a weakly prime, because it can be changed into another prime (91351901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45675953 + 45675954.

It is an arithmetic number, because the mean of its divisors is an integer number (45675954).

Almost surely, 2^91351907 is an apocalyptic number.

91351907 is a deficient number, since it is larger than the sum of its proper divisors (1).

91351907 is an equidigital number, since it uses as much as digits as its factorization.

91351907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 91351907 is about 9557.8191550165. The cubic root of 91351907 is about 450.3731998725.

The spelling of 91351907 in words is "ninety-one million, three hundred fifty-one thousand, nine hundred seven".