91358986 has 8 divisors (see below), whose sum is σ = 145099620. Its totient is φ = 42992448.

The previous prime is 91358977. The next prime is 91358987. The reversal of 91358986 is 68985319.

It can be written as a sum of positive squares in 2 ways, for example, as 77528025 + 13830961 = 8805^2 + 3719^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (91358987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343481 + ... + 1343548.

Almost surely, 2^91358986 is an apocalyptic number.

91358986 is a deficient number, since it is larger than the sum of its proper divisors (53740634).

91358986 is a wasteful number, since it uses less digits than its factorization.

91358986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687048.

The product of its digits is 466560, while the sum is 49.

The square root of 91358986 is about 9558.1894729075. The cubic root of 91358986 is about 450.3848329430.

The spelling of 91358986 in words is "ninety-one million, three hundred fifty-eight thousand, nine hundred eighty-six".