64431353 has 4 divisors (see below), whose sum is σ = 73635840. Its totient is φ = 55226868.

The previous prime is 64431281. The next prime is 64431371. The reversal of 64431353 is 35313446.

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 64431353 - 2¹⁴ = 64414969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64431383) 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, 4602233 + ... + 4602246.

It is an arithmetic number, because the mean of its divisors is an integer number (18408960).

Almost surely, 2^64431353 is an apocalyptic number.

It is an amenable number.

64431353 is a deficient number, since it is larger than the sum of its proper divisors (9204487).

64431353 is an equidigital number, since it uses as much as digits as its factorization.

64431353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9204486.

The product of its digits is 12960, while the sum is 29.

The square root of 64431353 is about 8026.9142888161. The cubic root of 64431353 is about 400.8966406703.

Adding to 64431353 its reverse (35313446), we get a palindrome (99744799).

The spelling of 64431353 in words is "sixty-four million, four hundred thirty-one thousand, three hundred fifty-three".