91361649 has 8 divisors (see below), whose sum is σ = 121934592. Its totient is φ = 60848240.

The previous prime is 91361639. The next prime is 91361651. The reversal of 91361649 is 94616319.

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

It is a cyclic number.

It is not a de Polignac number, because 91361649 - 2¹¹ = 91359601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91361609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11169 + ... + 17534.

It is an arithmetic number, because the mean of its divisors is an integer number (15241824).

Almost surely, 2^91361649 is an apocalyptic number.

It is an amenable number.

91361649 is a deficient number, since it is larger than the sum of its proper divisors (30572943).

91361649 is a wasteful number, since it uses less digits than its factorization.

91361649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29767.

The product of its digits is 34992, while the sum is 39.

The square root of 91361649 is about 9558.3287765174. The cubic root of 91361649 is about 450.3892089517.

The spelling of 91361649 in words is "ninety-one million, three hundred sixty-one thousand, six hundred forty-nine".