91795787 has 2 divisors, whose sum is σ = 91795788. Its totient is φ = 91795786.

The previous prime is 91795741. The next prime is 91795811. The reversal of 91795787 is 78759719.

It is a strong prime.

It is an emirp because it is prime and its reverse (78759719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91795787 - 2⁶ = 91795723 is a prime.

It is a super-3 number, since 3×91795787³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (91795387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45897893 + 45897894.

It is an arithmetic number, because the mean of its divisors is an integer number (45897894).

Almost surely, 2^91795787 is an apocalyptic number.

91795787 is a deficient number, since it is larger than the sum of its proper divisors (1).

91795787 is an equidigital number, since it uses as much as digits as its factorization.

91795787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1111320, while the sum is 53.

The square root of 91795787 is about 9581.0117941687. The cubic root of 91795787 is about 451.1014778133.

The spelling of 91795787 in words is "ninety-one million, seven hundred ninety-five thousand, seven hundred eighty-seven".