65121197 has 8 divisors (see below), whose sum is σ = 65644992. Its totient is φ = 64600000.

The previous prime is 65121187. The next prime is 65121239. The reversal of 65121197 is 79112156.

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 65121197 - 2⁴ = 65121181 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 (65121127) 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, 100328 + ... + 100974.

It is an arithmetic number, because the mean of its divisors is an integer number (8205624).

Almost surely, 2^65121197 is an apocalyptic number.

It is an amenable number.

65121197 is a deficient number, since it is larger than the sum of its proper divisors (523795).

65121197 is a wasteful number, since it uses less digits than its factorization.

65121197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299.

The product of its digits is 3780, while the sum is 32.

The square root of 65121197 is about 8069.7705667510. The cubic root of 65121197 is about 402.3223180871.

The spelling of 65121197 in words is "sixty-five million, one hundred twenty-one thousand, one hundred ninety-seven".