91613340 has 432 divisors, whose sum is σ = 376451712. Its totient is φ = 17805312.

The previous prime is 91613329. The next prime is 91613351. The reversal of 91613340 is 4331619.

91613340 is a `hidden beast` number, since 9 + 1 + 613 + 3 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (91613329) and next prime (91613351).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1949197 + ... + 1949243.

It is an arithmetic number, because the mean of its divisors is an integer number (871416).

Almost surely, 2^91613340 is an apocalyptic number.

91613340 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91613340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188225856).

91613340 is an abundant number, since it is smaller than the sum of its proper divisors (284838372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91613340 is a wasteful number, since it uses less digits than its factorization.

91613340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 91613340 is about 9571.4857780806. The cubic root of 91613340 is about 450.8024201611.

Adding to 91613340 its reverse (4331619), we get a palindrome (95944959).

The spelling of 91613340 in words is "ninety-one million, six hundred thirteen thousand, three hundred forty".