1207664643 has 16 divisors (see below), whose sum is σ = 1698681600. Its totient is φ = 761064480.

The previous prime is 1207664621. The next prime is 1207664651. The reversal of 1207664643 is 3464667021.

It is a happy number.

It is not a de Polignac number, because 1207664643 - 2⁹ = 1207664131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1207664693) 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, 3298 + ... + 49256.

It is an arithmetic number, because the mean of its divisors is an integer number (106167600).

Almost surely, 2^1207664643 is an apocalyptic number.

1207664643 is a deficient number, since it is larger than the sum of its proper divisors (491016957).

1207664643 is a wasteful number, since it uses less digits than its factorization.

1207664643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46442.

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 1207664643 is about 34751.4696523759. The cubic root of 1207664643 is about 1064.9162410709.

The spelling of 1207664643 in words is "one billion, two hundred seven million, six hundred sixty-four thousand, six hundred forty-three".