643377097 has 8 divisors (see below), whose sum is σ = 704403072. Its totient is φ = 582774000.

The previous prime is 643377089. The next prime is 643377101. The reversal of 643377097 is 790773346.

643377097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 643377097 - 2³ = 643377089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643377067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102529 + ... + 108622.

It is an arithmetic number, because the mean of its divisors is an integer number (88050384).

Almost surely, 2^643377097 is an apocalyptic number.

It is an amenable number.

643377097 is a deficient number, since it is larger than the sum of its proper divisors (61025975).

643377097 is a wasteful number, since it uses less digits than its factorization.

643377097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211439.

The product of its (nonzero) digits is 666792, while the sum is 46.

The square root of 643377097 is about 25364.8792033394. The cubic root of 643377097 is about 863.2869958019.

The spelling of 643377097 in words is "six hundred forty-three million, three hundred seventy-seven thousand, ninety-seven".