65894731 has 4 divisors (see below), whose sum is σ = 75308272. Its totient is φ = 56481192.

The previous prime is 65894729. The next prime is 65894761. The reversal of 65894731 is 13749856.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65894731 - 2¹ = 65894729 is a prime.

It is a super-2 number, since 2×65894731² = 8684231147124722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65894761) 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 3 ways as a sum of consecutive naturals, for example, 4706760 + ... + 4706773.

It is an arithmetic number, because the mean of its divisors is an integer number (18827068).

Almost surely, 2^65894731 is an apocalyptic number.

65894731 is a deficient number, since it is larger than the sum of its proper divisors (9413541).

65894731 is an equidigital number, since it uses as much as digits as its factorization.

65894731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9413540.

The product of its digits is 181440, while the sum is 43.

The square root of 65894731 is about 8117.5569600712. The cubic root of 65894731 is about 403.9090305095.

The spelling of 65894731 in words is "sixty-five million, eight hundred ninety-four thousand, seven hundred thirty-one".