65405197 has 24 divisors (see below), whose sum is σ = 78107328. Its totient is φ = 54288000.

The previous prime is 65405183. The next prime is 65405213. The reversal of 65405197 is 79150456.

It is a de Polignac number, because none of the positive numbers 2^k-65405197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65405117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280593 + ... + 280825.

It is an arithmetic number, because the mean of its divisors is an integer number (3254472).

Almost surely, 2^65405197 is an apocalyptic number.

It is an amenable number.

65405197 is a deficient number, since it is larger than the sum of its proper divisors (12702131).

65405197 is a wasteful number, since it uses less digits than its factorization.

65405197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 65405197 is about 8087.3479583854. The cubic root of 65405197 is about 402.9063257825.

The spelling of 65405197 in words is "sixty-five million, four hundred five thousand, one hundred ninety-seven".