65730431 has 4 divisors (see below), whose sum is σ = 70786632. Its totient is φ = 60674232.

The previous prime is 65730409. The next prime is 65730437. The reversal of 65730431 is 13403756.

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 65730431 - 2¹⁸ = 65468287 is a prime.

It is a super-2 number, since 2×65730431² = 8640979118891522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65730394 and 65730403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65730437) 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, 2528081 + ... + 2528106.

It is an arithmetic number, because the mean of its divisors is an integer number (17696658).

Almost surely, 2^65730431 is an apocalyptic number.

65730431 is a deficient number, since it is larger than the sum of its proper divisors (5056201).

65730431 is a wasteful number, since it uses less digits than its factorization.

65730431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5056200.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 65730431 is about 8107.4306040817. The cubic root of 65730431 is about 403.5730527843.

The spelling of 65730431 in words is "sixty-five million, seven hundred thirty thousand, four hundred thirty-one".