71650091 has 2 divisors, whose sum is σ = 71650092. Its totient is φ = 71650090.

The previous prime is 71650069. The next prime is 71650151. The reversal of 71650091 is 19005617.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19005617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71650091 - 2⁶ = 71650027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71650991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35825045 + 35825046.

It is an arithmetic number, because the mean of its divisors is an integer number (35825046).

Almost surely, 2^71650091 is an apocalyptic number.

71650091 is a deficient number, since it is larger than the sum of its proper divisors (1).

71650091 is an equidigital number, since it uses as much as digits as its factorization.

71650091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 71650091 is about 8464.6376768294. The cubic root of 71650091 is about 415.3417439548.

The spelling of 71650091 in words is "seventy-one million, six hundred fifty thousand, ninety-one".