91550747 has 2 divisors, whose sum is σ = 91550748. Its totient is φ = 91550746.

The previous prime is 91550707. The next prime is 91550749. The reversal of 91550747 is 74705519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91550747 - 2¹⁴ = 91534363 is a prime.

Together with 91550749, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 91550747 parts by 13531 straight cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 91550747.

It is not a weakly prime, because it can be changed into another prime (91550749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45775373 + 45775374.

It is an arithmetic number, because the mean of its divisors is an integer number (45775374).

Almost surely, 2^91550747 is an apocalyptic number.

91550747 is a deficient number, since it is larger than the sum of its proper divisors (1).

91550747 is an equidigital number, since it uses as much as digits as its factorization.

91550747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 91550747 is about 9568.2154553501. The cubic root of 91550747 is about 450.6997294956.

The spelling of 91550747 in words is "ninety-one million, five hundred fifty thousand, seven hundred forty-seven".