645298093 has 8 divisors (see below), whose sum is σ = 722988000. Its totient is φ = 570779280.

The previous prime is 645298091. The next prime is 645298099. The reversal of 645298093 is 390892546.

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 645298093 - 2¹ = 645298091 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645298091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792343 + ... + 793156.

It is an arithmetic number, because the mean of its divisors is an integer number (90373500).

Almost surely, 2^645298093 is an apocalyptic number.

It is an amenable number.

645298093 is a deficient number, since it is larger than the sum of its proper divisors (77689907).

645298093 is a wasteful number, since it uses less digits than its factorization.

645298093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585547.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 645298093 is about 25402.7182206944. The cubic root of 645298093 is about 864.1453431507.

The spelling of 645298093 in words is "six hundred forty-five million, two hundred ninety-eight thousand, ninety-three".