91954579 has 2 divisors, whose sum is σ = 91954580. Its totient is φ = 91954578.

The previous prime is 91954559. The next prime is 91954591. The reversal of 91954579 is 97545919.

It is a strong prime.

It is an emirp because it is prime and its reverse (97545919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91954579 - 2⁹ = 91954067 is a prime.

It is not a weakly prime, because it can be changed into another prime (91954519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45977289 + 45977290.

It is an arithmetic number, because the mean of its divisors is an integer number (45977290).

Almost surely, 2^91954579 is an apocalyptic number.

91954579 is a deficient number, since it is larger than the sum of its proper divisors (1).

91954579 is an equidigital number, since it uses as much as digits as its factorization.

91954579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 510300, while the sum is 49.

The square root of 91954579 is about 9589.2950210117. The cubic root of 91954579 is about 451.3614390609.

The spelling of 91954579 in words is "ninety-one million, nine hundred fifty-four thousand, five hundred seventy-nine".