91511383 has 2 divisors, whose sum is σ = 91511384. Its totient is φ = 91511382.

The previous prime is 91511369. The next prime is 91511389. The reversal of 91511383 is 38311519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91511383 - 2⁵ = 91511351 is a prime.

It is equal to p_5299600 and since 91511383 and 5299600 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91511389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45755691 + 45755692.

It is an arithmetic number, because the mean of its divisors is an integer number (45755692).

Almost surely, 2^91511383 is an apocalyptic number.

91511383 is a deficient number, since it is larger than the sum of its proper divisors (1).

91511383 is an equidigital number, since it uses as much as digits as its factorization.

91511383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 31.

The square root of 91511383 is about 9566.1582152921. The cubic root of 91511383 is about 450.6351245703.

The spelling of 91511383 in words is "ninety-one million, five hundred eleven thousand, three hundred eighty-three".