7097840643 has 18 divisors (see below), whose sum is σ = 9563863044. Its totient is φ = 4682377224.

The previous prime is 7097840611. The next prime is 7097840657. The reversal of 7097840643 is 3460487907.

It is a happy number.

It is not a de Polignac number, because 7097840643 - 2⁵ = 7097840611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7097840592 and 7097840601.

It is not an unprimeable number, because it can be changed into a prime (7097840143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18532030 + ... + 18532412.

Almost surely, 2^7097840643 is an apocalyptic number.

7097840643 is a deficient number, since it is larger than the sum of its proper divisors (2466022401).

7097840643 is an frugal number, since it uses more digits than its factorization.

7097840643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The square root of 7097840643 is about 84248.6833309578. The cubic root of 7097840643 is about 1921.8024742660.

Multiplying 7097840643 by its sum of digits (48), we get a square (340696350864 = 583692²).

The spelling of 7097840643 in words is "seven billion, ninety-seven million, eight hundred forty thousand, six hundred forty-three".