91349730 has 48 divisors (see below), whose sum is σ = 238136184. Its totient is φ = 24295680.

The previous prime is 91349729. The next prime is 91349737. The reversal of 91349730 is 3794319.

It can be written as a sum of positive squares in 4 ways, for example, as 88792929 + 2556801 = 9423^2 + 1599^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (91349737) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40020 + ... + 42240.

Almost surely, 2^91349730 is an apocalyptic number.

91349730 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

91349730 is an abundant number, since it is smaller than the sum of its proper divisors (146786454).

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

91349730 is a wasteful number, since it uses less digits than its factorization.

91349730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691 (or 2688 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 91349730 is about 9557.7052685255. The cubic root of 91349730 is about 450.3696222415.

The spelling of 91349730 in words is "ninety-one million, three hundred forty-nine thousand, seven hundred thirty".