91701646 has 4 divisors (see below), whose sum is σ = 137552472. Its totient is φ = 45850822.

The previous prime is 91701641. The next prime is 91701661. The reversal of 91701646 is 64610719.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64610719 = 349 ⋅185131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91701641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22925410 + ... + 22925413.

It is an arithmetic number, because the mean of its divisors is an integer number (34388118).

Almost surely, 2^91701646 is an apocalyptic number.

91701646 is a deficient number, since it is larger than the sum of its proper divisors (45850826).

91701646 is a wasteful number, since it uses less digits than its factorization.

91701646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45850825.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 91701646 is about 9576.0976394354. The cubic root of 91701646 is about 450.9472163043.

It can be divided in two parts, 9170 and 1646, that added together give a square (10816 = 104²).

The spelling of 91701646 in words is "ninety-one million, seven hundred one thousand, six hundred forty-six".