646892349 has 16 divisors (see below), whose sum is σ = 904689408. Its totient is φ = 410674752.

The previous prime is 646892339. The next prime is 646892353. The reversal of 646892349 is 943298646.

It is not a de Polignac number, because 646892349 - 2⁴ = 646892333 is a prime.

It is a super-2 number, since 2×646892349² = 836939422389475602, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646892329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56782 + ... + 67215.

It is an arithmetic number, because the mean of its divisors is an integer number (56543088).

Almost surely, 2^646892349 is an apocalyptic number.

It is an amenable number.

646892349 is a deficient number, since it is larger than the sum of its proper divisors (257797059).

646892349 is a wasteful number, since it uses less digits than its factorization.

646892349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124084.

The product of its digits is 2239488, while the sum is 51.

The square root of 646892349 is about 25434.0784971660. The cubic root of 646892349 is about 864.8564025944.

The spelling of 646892349 in words is "six hundred forty-six million, eight hundred ninety-two thousand, three hundred forty-nine".