65193691 has 8 divisors (see below), whose sum is σ = 70002144. Its totient is φ = 60493440.

The previous prime is 65193673. The next prime is 65193697. The reversal of 65193691 is 19639156.

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

It is a cyclic number.

It is not a de Polignac number, because 65193691 - 2⁵ = 65193659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65193697) 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, 25800 + ... + 28213.

It is an arithmetic number, because the mean of its divisors is an integer number (8750268).

Almost surely, 2^65193691 is an apocalyptic number.

65193691 is a deficient number, since it is larger than the sum of its proper divisors (4808453).

65193691 is a wasteful number, since it uses less digits than its factorization.

65193691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54101.

The product of its digits is 43740, while the sum is 40.

The square root of 65193691 is about 8074.2610188178. The cubic root of 65193691 is about 402.4715533565.

The spelling of 65193691 in words is "sixty-five million, one hundred ninety-three thousand, six hundred ninety-one".