646592397 has 16 divisors (see below), whose sum is σ = 950198592. Its totient is φ = 387832320.

The previous prime is 646592377. The next prime is 646592407. The reversal of 646592397 is 793295646.

646592397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 646592397 - 2¹⁰ = 646591373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646592377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97798 + ... + 104199.

It is an arithmetic number, because the mean of its divisors is an integer number (59387412).

Almost surely, 2^646592397 is an apocalyptic number.

It is an amenable number.

646592397 is a deficient number, since it is larger than the sum of its proper divisors (303606195).

646592397 is a wasteful number, since it uses less digits than its factorization.

646592397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202108.

The product of its digits is 2449440, while the sum is 51.

The square root of 646592397 is about 25428.1811579200. The cubic root of 646592397 is about 864.7227092971.

The spelling of 646592397 in words is "six hundred forty-six million, five hundred ninety-two thousand, three hundred ninety-seven".