91950647 has 4 divisors (see below), whose sum is σ = 92432256. Its totient is φ = 91469040.

The previous prime is 91950629. The next prime is 91950673. The reversal of 91950647 is 74605919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74605919 = 8431 ⋅8849.

It is a cyclic number.

It is not a de Polignac number, because 91950647 - 2⁶ = 91950583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91950697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240518 + ... + 240899.

It is an arithmetic number, because the mean of its divisors is an integer number (23108064).

Almost surely, 2^91950647 is an apocalyptic number.

91950647 is a deficient number, since it is larger than the sum of its proper divisors (481609).

91950647 is a wasteful number, since it uses less digits than its factorization.

91950647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481608.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 91950647 is about 9589.0899985348. The cubic root of 91950647 is about 451.3550055279.

The spelling of 91950647 in words is "ninety-one million, nine hundred fifty thousand, six hundred forty-seven".