91945147 has 8 divisors (see below), whose sum is σ = 105142752. Its totient is φ = 78763200.

The previous prime is 91945141. The next prime is 91945153. The reversal of 91945147 is 74154919.

It is an interprime number because it is at equal distance from previous prime (91945141) and next prime (91945153).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91945147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91945141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14397 + ... + 19777.

It is an arithmetic number, because the mean of its divisors is an integer number (13142844).

Almost surely, 2^91945147 is an apocalyptic number.

91945147 is a deficient number, since it is larger than the sum of its proper divisors (13197605).

91945147 is a wasteful number, since it uses less digits than its factorization.

91945147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7829.

The product of its digits is 45360, while the sum is 40.

The square root of 91945147 is about 9588.8032099945. The cubic root of 91945147 is about 451.3460061276.

It can be divided in two parts, 9194 and 5147, that added together give a palindrome (14341).

The spelling of 91945147 in words is "ninety-one million, nine hundred forty-five thousand, one hundred forty-seven".