91057606 has 4 divisors (see below), whose sum is σ = 136586412. Its totient is φ = 45528802.

The previous prime is 91057601. The next prime is 91057663. The reversal of 91057606 is 60675019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60675019 = 1907 ⋅31817.

It is a super-2 number, since 2×91057606² = 16582975220902472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91057601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22764400 + ... + 22764403.

It is an arithmetic number, because the mean of its divisors is an integer number (34146603).

Almost surely, 2^91057606 is an apocalyptic number.

91057606 is a deficient number, since it is larger than the sum of its proper divisors (45528806).

91057606 is a wasteful number, since it uses less digits than its factorization.

91057606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45528805.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 91057606 is about 9542.4109112949. The cubic root of 91057606 is about 449.8890360145.

The spelling of 91057606 in words is "ninety-one million, fifty-seven thousand, six hundred six".