65191893 has 16 divisors (see below), whose sum is σ = 94523520. Its totient is φ = 39726144.

The previous prime is 65191879. The next prime is 65191897. The reversal of 65191893 is 39819156.

It is a de Polignac number, because none of the positive numbers 2^k-65191893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65191897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4098 + ... + 12131.

It is an arithmetic number, because the mean of its divisors is an integer number (5907720).

Almost surely, 2^65191893 is an apocalyptic number.

It is an amenable number.

65191893 is a deficient number, since it is larger than the sum of its proper divisors (29331627).

65191893 is a wasteful number, since it uses less digits than its factorization.

65191893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16348.

The product of its digits is 58320, while the sum is 42.

The square root of 65191893 is about 8074.1496765913. The cubic root of 65191893 is about 402.4678533538.

The spelling of 65191893 in words is "sixty-five million, one hundred ninety-one thousand, eight hundred ninety-three".