91622543 has 2 divisors, whose sum is σ = 91622544. Its totient is φ = 91622542.

The previous prime is 91622527. The next prime is 91622561. The reversal of 91622543 is 34522619.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (34522619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91622543 - 2⁴ = 91622527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91622243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45811271 + 45811272.

It is an arithmetic number, because the mean of its divisors is an integer number (45811272).

Almost surely, 2^91622543 is an apocalyptic number.

91622543 is a deficient number, since it is larger than the sum of its proper divisors (1).

91622543 is an equidigital number, since it uses as much as digits as its factorization.

91622543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 91622543 is about 9571.9665168658. The cubic root of 91622543 is about 450.8175147451.

The spelling of 91622543 in words is "ninety-one million, six hundred twenty-two thousand, five hundred forty-three".