64291433 has 4 divisors (see below), whose sum is σ = 68073300. Its totient is φ = 60509568.

The previous prime is 64291393. The next prime is 64291439. The reversal of 64291433 is 33419246.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19829209 + 44462224 = 4453^2 + 6668^2 .

It is a cyclic number.

It is not a de Polignac number, because 64291433 - 2⁶ = 64291369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64291433.

It is not an unprimeable number, because it can be changed into a prime (64291439) 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, 1890908 + ... + 1890941.

It is an arithmetic number, because the mean of its divisors is an integer number (17018325).

Almost surely, 2^64291433 is an apocalyptic number.

It is an amenable number.

64291433 is a deficient number, since it is larger than the sum of its proper divisors (3781867).

64291433 is a wasteful number, since it uses less digits than its factorization.

64291433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781866.

The product of its digits is 15552, while the sum is 32.

The square root of 64291433 is about 8018.1938739345. The cubic root of 64291433 is about 400.6062328236.

The spelling of 64291433 in words is "sixty-four million, two hundred ninety-one thousand, four hundred thirty-three".