65403491 has 8 divisors (see below), whose sum is σ = 68925120. Its totient is φ = 61889832.

The previous prime is 65403479. The next prime is 65403493. The reversal of 65403491 is 19430456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65403491 - 2¹⁸ = 65141347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65403493) 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 7 ways as a sum of consecutive naturals, for example, 23036 + ... + 25718.

It is an arithmetic number, because the mean of its divisors is an integer number (8615640).

Almost surely, 2^65403491 is an apocalyptic number.

65403491 is a deficient number, since it is larger than the sum of its proper divisors (3521629).

65403491 is a wasteful number, since it uses less digits than its factorization.

65403491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3985.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 65403491 is about 8087.2424843082. The cubic root of 65403491 is about 402.9028226757.

The spelling of 65403491 in words is "sixty-five million, four hundred three thousand, four hundred ninety-one".