2001672643 has 2 divisors, whose sum is σ = 2001672644. Its totient is φ = 2001672642.

The previous prime is 2001672619. The next prime is 2001672653. The reversal of 2001672643 is 3462761002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001672643 - 2⁵ = 2001672611 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001672653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000836321 + 1000836322.

It is an arithmetic number, because the mean of its divisors is an integer number (1000836322).

Almost surely, 2^2001672643 is an apocalyptic number.

2001672643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001672643 is an equidigital number, since it uses as much as digits as its factorization.

2001672643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 2001672643 is about 44740.0563589274. The cubic root of 2001672643 is about 1260.2721850465.

The spelling of 2001672643 in words is "two billion, one million, six hundred seventy-two thousand, six hundred forty-three".