91754987 has 2 divisors, whose sum is σ = 91754988. Its totient is φ = 91754986.

The previous prime is 91754969. The next prime is 91755017. The reversal of 91754987 is 78945719.

It is a weak prime.

It is an emirp because it is prime and its reverse (78945719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91754987 - 2⁸ = 91754731 is a prime.

It is not a weakly prime, because it can be changed into another prime (91751987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45877493 + 45877494.

It is an arithmetic number, because the mean of its divisors is an integer number (45877494).

Almost surely, 2^91754987 is an apocalyptic number.

91754987 is a deficient number, since it is larger than the sum of its proper divisors (1).

91754987 is an equidigital number, since it uses as much as digits as its factorization.

91754987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 50.

The square root of 91754987 is about 9578.8823460778. The cubic root of 91754987 is about 451.0346349935.

The spelling of 91754987 in words is "ninety-one million, seven hundred fifty-four thousand, nine hundred eighty-seven".