65391497 has 4 divisors (see below), whose sum is σ = 66312576. Its totient is φ = 64470420.

The previous prime is 65391463. The next prime is 65391517. The reversal of 65391497 is 79419356.

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 a cyclic number.

It is not a de Polignac number, because 65391497 - 2¹⁴ = 65375113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65391437) 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, 460433 + ... + 460574.

It is an arithmetic number, because the mean of its divisors is an integer number (16578144).

Almost surely, 2^65391497 is an apocalyptic number.

It is an amenable number.

65391497 is a deficient number, since it is larger than the sum of its proper divisors (921079).

65391497 is an equidigital number, since it uses as much as digits as its factorization.

65391497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921078.

The product of its digits is 204120, while the sum is 44.

The square root of 65391497 is about 8086.5009120138. The cubic root of 65391497 is about 402.8781924314.

The spelling of 65391497 in words is "sixty-five million, three hundred ninety-one thousand, four hundred ninety-seven".