647393061 has 64 divisors (see below), whose sum is σ = 1073899520. Its totient is φ = 338722560.

The previous prime is 647393053. The next prime is 647393069. The reversal of 647393061 is 160393746.

It is an interprime number because it is at equal distance from previous prime (647393053) and next prime (647393069).

It is not a de Polignac number, because 647393061 - 2³ = 647393053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647393069) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1630515 + ... + 1630911.

It is an arithmetic number, because the mean of its divisors is an integer number (16779680).

Almost surely, 2^647393061 is an apocalyptic number.

647393061 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

647393061 is a deficient number, since it is larger than the sum of its proper divisors (426506459).

647393061 is a wasteful number, since it uses less digits than its factorization.

647393061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 647393061 is about 25443.9199220560. The cubic root of 647393061 is about 865.0794857181.

The spelling of 647393061 in words is "six hundred forty-seven million, three hundred ninety-three thousand, sixty-one".