65913247 has 6 divisors (see below), whose sum is σ = 66227352. Its totient is φ = 65600532.

The previous prime is 65913227. The next prime is 65913251. The reversal of 65913247 is 74231956.

It is not a de Polignac number, because 65913247 - 2⁷ = 65913119 is a prime.

It is a super-2 number, since 2×65913247² = 8689112260166018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65913217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79678 + ... + 80500.

It is an arithmetic number, because the mean of its divisors is an integer number (11037892).

Almost surely, 2^65913247 is an apocalyptic number.

65913247 is a deficient number, since it is larger than the sum of its proper divisors (314105).

65913247 is an frugal number, since it uses more digits than its factorization.

65913247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389 (or 1106 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 65913247 is about 8118.6973708841. The cubic root of 65913247 is about 403.9468589221.

The spelling of 65913247 in words is "sixty-five million, nine hundred thirteen thousand, two hundred forty-seven".