91377630 has 48 divisors (see below), whose sum is σ = 239348304. Its totient is φ = 24186240.

The previous prime is 91377613. The next prime is 91377653. The reversal of 91377630 is 3677319.

91377630 is a `hidden beast` number, since 9 + 13 + 7 + 7 + 630 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8625 + ... + 16035.

It is an arithmetic number, because the mean of its divisors is an integer number (4986423).

Almost surely, 2^91377630 is an apocalyptic number.

91377630 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 91377630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119674152).

91377630 is an abundant number, since it is smaller than the sum of its proper divisors (147970674).

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

91377630 is a wasteful number, since it uses less digits than its factorization.

91377630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7561 (or 7558 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 36.

The square root of 91377630 is about 9559.1647124631. The cubic root of 91377630 is about 450.4154681476.

The spelling of 91377630 in words is "ninety-one million, three hundred seventy-seven thousand, six hundred thirty".