643069454 has 8 divisors (see below), whose sum is σ = 974548848. Its totient is φ = 318219840.

The previous prime is 643069451. The next prime is 643069457. The reversal of 643069454 is 454960346.

It is an interprime number because it is at equal distance from previous prime (643069451) and next prime (643069457).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643069451) 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, 1657202 + ... + 1657589.

It is an arithmetic number, because the mean of its divisors is an integer number (121818606).

Almost surely, 2^643069454 is an apocalyptic number.

643069454 is a deficient number, since it is larger than the sum of its proper divisors (331479394).

643069454 is a wasteful number, since it uses less digits than its factorization.

643069454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3314890.

The product of its (nonzero) digits is 311040, while the sum is 41.

The square root of 643069454 is about 25358.8141284249. The cubic root of 643069454 is about 863.1493748302.

The spelling of 643069454 in words is "six hundred forty-three million, sixty-nine thousand, four hundred fifty-four".