65198137 has 4 divisors (see below), whose sum is σ = 65221200. Its totient is φ = 65175076.

The previous prime is 65198131. The next prime is 65198143. The reversal of 65198137 is 73189156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (65198131) and next prime (65198143).

It is a cyclic number.

It is not a de Polignac number, because 65198137 - 2³ = 65198129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65198137.

It is not an unprimeable number, because it can be changed into a prime (65198131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6583 + ... + 13180.

It is an arithmetic number, because the mean of its divisors is an integer number (16305300).

Almost surely, 2^65198137 is an apocalyptic number.

It is an amenable number.

65198137 is a deficient number, since it is larger than the sum of its proper divisors (23063).

65198137 is a wasteful number, since it uses less digits than its factorization.

65198137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23062.

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

The square root of 65198137 is about 8074.5363334374. The cubic root of 65198137 is about 402.4807022370.

The spelling of 65198137 in words is "sixty-five million, one hundred ninety-eight thousand, one hundred thirty-seven".